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Welcome to the
Church Family of Petersburgh, NY website at
http://churchtree.tripod.com |
Kinship Relationships
Excerpted from University of California at Davis
webpage:
http://entomology.ucdavis.edu/courses/hde19/lecture4.html
Table 1. Kinship relative to Ego among seven generations.
Note that the children of the relatives in one entry are the entry one
generation down and one collateral step to the right. For example, your
grandfather's children (excepting your parents) are the entry to the
lower right of grandfathers/grandmothers which are your uncles/aunts.
And their children are your first cousins which is the entry to the
lower right of uncles/aunts. Collaterals 2, 3 and 4 represent first,
second and third cousins, respectively for the lineal kin in the same
generation. For example, the second cousins twice removed in generation
-2 for Ego are the second cousins of Ego's grandfather/grandmother.
COLLATERALS (Colineal and Ablineal) [description
of terminology]
|
<Generation... Lineal>..0 |
1 |
2 |
3 |
4 |
-3 |
Great Grandfather/Grandmother |
Great Grand Uncles/Aunts |
st cousthrice removed |
2nd cousins thrice removed |
3rd cousins thrice removed |
-2 |
Grandfather/Grandmother |
Grand Uncles/Aunts |
1st cousins twice removed |
2nd cousins twice removed |
3rd cousins twice removed |
-1 |
Father/Mother |
Uncle/Aunts |
1st cousins once removed |
2nd cousins once removed |
3rd cousins once removed |
0 |
Ego |
Brothers/sisters |
1st cousins |
2nd cousins |
3rd cousins |
+1 |
Sons/Daughters |
Nieces/ Nephews |
1st cousins once removed |
2nd cousins once removed |
3rd cousins once removed |
+2 |
Grandsons, granddaughters |
Great Grand Nieces/Nephews |
1st cousins twice removed |
2nd cousins twice removed |
3rd cousins twice removed |
+3 |
Great grandsons, grandaughters |
Great Grand Nieces, Nephews |
1st cousins thrice removed |
2nd cousins thrice removed |
3rd cousins thrice removed |
INTRODUCTION to KINSHIP
Kinship is really an extension of racial, genetical or ethnic groupings
in that all of these can be further divided into relatedness categories
such as tribes, clans or families. Individuals within family groups
are typically organized around a central person (designate this person
as 'Ego') in one-of-two ways:
Common progenitor (e.g. great grandfather)
Descendent (e.g. son, grandson)
The focus in both cases is on a person's genealogy (direct lineage for
either descendents or progenitors) and not on the more complete case
of their consanguinity (kinship). That is, everyone is part of:
Nuclear family--parents & children
Stem family--all direct ancestors & descendents
Extended family--nuclear and stem family plus assortment of other kin
such as uncles/aunts, nephews/nieces & cousins.
Family of Man. Science writer Guy Murchie explains, "no
human can be less closely related to any other human than approximately
fiftieth cousin, and most of us are a lot closer. The main point about
our universal interrelatedness is not that we are all descended from
some common ancestors. Rather it is that each of us contains genetic
contributions from practically everybody who ever lived. A single indirect
genetic contact between Africa and Asia in a thousand years can make
every African closer than fiftieth cousin to every Chinese. This can
occur simply in consequence of the wanderings of nomads in intermediate
territory. (from The Mountain of Names, Alex Shoumatoff, 1985).
Kin are divided into two general categories:
Lineal kin which are your direct descendents (children, grandchildren,
etc.) and progenitors (parents, grandparents, etc.)
Collaterals which are all other kin. The collaterals can, in turn,
be divided into two types:
Colineal--aunts/uncles, sibs, nephews/nieces.
These are the siblings of lineal kin
Ablineal--cousins. These are the siblings of the colineal kin.
Cross-classification of Cousinships
by degree (e.g. first, second, etc.)
by generation removed (e.g. once removed, twice removed, etc.).
A person can only have one set of, say, first cousins in his or her
own generation but may have two sets of first cousins once removed:
i)your parent's first cousins are your first cousins once removed; and
ii)your own first cousin's children are also your first cousins once
removed. In the former case these first cousins are once removed back
a generation and in the latter case they are once removed forward a
generation.
- the parents of your great grandmother or great grandfather are
your second great grandparents and you are a second great grandson
to them
- the children of your grandnephews and grandnieces are your great
grandnephews or great grandnieces and you are great grand uncles to
them
- your father's brother or sister is your uncle or aunt and you are
a nephew or niece to them
- the children of your first cousins are first cousins once removed
and you are the same to them
- the children of your second cousins are your second cousins once
removed and you are the same to them
- the grandchildren of your second cousins are your second cousins
twice removed and you are the same to them
- your grandfather's brothers are your great uncles, their children
are your first cousins once removed and also your father's first cousins,
and their grandchildren are your second cousins (or your second cousins
are the children of your parent's first cousins).
An important aspect in understanding all kinship relations involves
the biological pathways by which someone came to be your kin. This is
especially true for all collaterals but is also important for lineal
kin. For example, you have eight great grandparents representing four
surnames (traditionally), three of which are not your own. That is,
two of these three are associated with your mother's side and one of
these three is associated with your father's mother's side. Thus in
identifying grandparents it is important to keep the paths straight
so that collaterals can be organized and traced accordingly. For example,
your first cousins may be derived from either your father's side or
your mother's side and your second cousins may be derived from four
sources. These are the siblings of either: i)your paternal grandfather;
ii)your paternal grandmother; iii)your maternal grandfather; and iv)your
maternal grandmother.
Genealogy and Family History
Genealogy--history of descent of person or family from ancestor
Ancestry--evokes an image of a family tree branching further as it ascends
Lineage--stresses descent in line; single ancestor; Two people may have
identical lineage but different ancestry
Pedigree--collective term referring to all consanguine relations
Vertical genealogy--concerned with lineal and colineal kin (e.g. grandparents;
great aunts)
Horizontal genealogy--concerned with ablineal kin (e.g. second cousins
once removed)
Note the various levels of information for genealogical research in
Table 1. First level includes data sheets such as family group sheets.
Second level are data summary sheets such as ancestral and lineage charts.
Third level are personal and family biographies. One of the most useful
references for researching your own family tree is the book by Eakle
and Cerny (1984). In general, books on genealogy provide techniques
and approaches for finding your remote kin. However they seldom provide
broad overviews of kinship and pedigree relations. (Eakle, Arlene and
Johni Cerny. 1984. The Source. A Guidebook of American Genealogy. Ancestry
Publications Company, Salt Lake City, Utah).
Pedigree Collapse
If you kept multiplying your progenitors by two every generation--doubling
your parents, their parents and so on--when you reached the time of
Charlemagne (ca. 800 AD) you would have between four and seventeen billion
of them. But obviously there were nowhere near that many people alive
then or at any time. What prevents the theoretical population implosion
from taking place is called "pedigree collapse". This is caused
by cousins marrying cousins--the intentional mating between close cousins
and random mating between distant ones who don't even know they are
related. Each time cousins marry, duplication occurs in their descendant's
pedigrees, because cousins already occupy a slot there. The farther
back one traces any person's genealogy the greater the rate of duplication
grows, until finally, when there is more cousin intermarriage than input
from new people, the shape of one's pedigree stops expanding and begins
to narrow. Each person's complete family tree, in other words, is shaped
like a diamond. In the beginning it expands upward from him in an inverted
triangle. At some point, hundreds of years back, the rate of expansion
peaks, the base of the inverted triangle is reached and, overwhelmed
by "collapse," the pedigree starts to narrow again, eventually
coming to a point at a theoretical first couple--Adam and Eve. (from
The Mountain of Names, Alex Shoumatoff, 1985).
Table 2. Consanguinity and equivalencies of genetical relatedness
in genealogy.
CONSANGUINITY (Kinship)
Lineal |
Colineal |
Ablineal |
SHARED GENES |
Self |
Identical twin |
|
1 |
Parents & children |
Siblings |
|
1/2 |
Grandparents &
grandchildren |
Uncles, nephews & half-sibs |
Double 1st cousins |
1/4 |
Great grandparents/ grandchildren |
Great uncles & grand nephews |
1st cousins |
1/8 |
2nd great grandparents/ grandchildren |
Great grand uncles & great grand nephews |
1st cousins once removed |
1/16 |
3rd great grandparents/ grandchildren |
2nd great grand uncles/ great grand nephews |
1st cousins twice removed & second cousins |
1/32 |
4th great grandparents/ grandchildren |
3rd great grand uncles/ great grand nephews |
1st cousins thrice removed & second cousins once removed |
1/64 |
5th great grandparents/ grandchildren |
4th great grand uncles/ great grand nephews |
3rd cousins & 2nd cousins twice removed |
1/128 |
6th great grandparents/ grandchildren |
5th great grand uncles/ great grand nephews |
2nd cousins thrice removed & 3rd cousins once removed |
1/256 |
7th great grandparents/ grandchildren |
6th great grand uncles/ great grand nephews |
4th cousins & 3rd cousins twice removed |
1/512 |
8th great grandparents/ grandchildren |
7th great grand uncles/ great grand nephews |
3rd cousins thrice removed |
1/1024 |
Page Layout and Charts by Daniel Bornt,
2001
"The Church
Family of Petersburgh, NY featuring descendants of Frank and Myrtle
Church" website
at http://churchtree.tripod.com
©2002 by Daniel J. Bornt,
e-mail to: vanatalan@yahoo.com
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