Jonathan Coxhead ☺, 2002-01-07
This is a ``prototype创 family tree. Instead of the names of real people, each slot is filled by the name of the relationship that connects that slot to ``self.创 This enables all the different varieties of cousins, 2nd cousins, ½-cousins, and all the rest, to appear in their correct locations.
The family is rather unusual: both the father and the mother of ``self创 remarried, so ``self创 has stepsiblings and ½-siblings on both sides.
There磗 a separate explanation of the notation.
Great-grandfather <= Great-grandmother
Great-aunt => Great-uncle
Grandfather <= Grandmother
Aunt => Uncle
Father
<= Mother
Brother <= Sister in law
Niece => Nephew in law
Great-niece => Great-nephew in law
Great-great-niece => Great-great-nephew in law
Great-great-nephew <= Great-great-niece in law
Great-nephew <= Great-niece in law
Great-great-niece => Great-great-nephew in law
Great-great-nephew <= Great-great-niece in law
Nephew <= Niece in law
Great-niece => Great-nephew in law
Great-nephew <= Great-niece in law
Self ~ Ex-spouse
Daughter => Son in law
Granddaughter => Grandson in law
Great-granddaughter => Great-grandson in law
Great-grandson <= Great-granddaughter in law
Grandson <= Granddaughter in law
Great-granddaughter => Great-grandson in law
Great-grandson <= Great-granddaughter in law
Son <= Daughter in law
Granddaughter => Grandson in law
Grandson <= Granddaughter in law
~ Spouse
Daughter => Son in law
Son <= Daughter in law
Sister => Brother in law
Niece => Nephew in law
Nephew <= Niece in law
<= Stepmother
½-brother <= ½-sister in law
½-niece => ½-nephew in law
½-great-niece => ½-great-nephew in law
½-great-great-niece => ½-great-great-nephew in law
½-great-great-nephew <= ½-great-great-niece in law
½-great-nephew <= ½-great-niece in law
½-great-great-niece => ½-great-great-nephew in law
½-great-great-nephew <= ½-great-great-niece in law
½-nephew <= ½-niece in law
½-great-niece => ½-great-nephew in law
½-great-nephew <= ½-great-niece in law
½-sister => ½-brother in law
½-niece => ½-nephew in law
½-nephew <= ½-niece in law
Uncle <= Aunt
Cousin
Cousin once removed
Cousin twice removed
Cousin 3 times removed
Great-uncle <= Great-aunt
Cousin once removed
2nd cousin
2nd cousin once removed
2nd cousin twice removed
2nd cousin 3 times removed
Great-grandfather <= Great-grandmother
Great-aunt => Great-uncle
Grandfather <= Grandmother
Aunt => Uncle
Mother => Father
=> Stepfather
½-brother <= ½-sister in law
½-sister => ½-brother in law
Uncle <= Aunt
Great-uncle <= Great-aunt
Stepgreat-grandfather <= Stepgreat-grandmother
Stepgreat-aunt => Stepgreat-uncle
Stepgrandfather <= Stepgrandmother
Stepaunt => Stepuncle
Stepfather <= _____
Stepbrother <= Stepsister in law
Stepsister => Stepbrother in law
<= Mother
½-brother <= ½-sister in law
½-sister => ½-brother in law
Stepuncle <= Stepaunt
Stepgreat-uncle <= Stepgreat-aunt
Stepgreat-grandfather <= Stepgreat-grandmother
Stepgreat-aunt => Stepgreat-uncle
Stepgrandfather <= Stepgrandmother
Stepaunt => Stepuncle
Stepmother => _____
Stepbrother <= Stepsister in law
Stepsister => Stepbrother in law
=> Father
Stepuncle <= Stepaunt
Stepgreat-uncle <= Stepgreat-aunt
There are 2 copies of this, but they are identical. One refers to the paternal grandfather, the other to the maternal.
Great-grandfather <= Great-grandmother
Great-aunt => Great-uncle
Grandmother => Grandfather
Great-uncle <= Great-aunt
Great-grandfather in law <= Great-grandmother in law
Great-aunt in law => Great-uncle in law
Grandfather in law <= Grandmother in law
Aunt in law => Uncle in law
Father in law <= Mother in law
Brother in law <= Sister in law
Niece => Nephew in law
Nephew <= Niece in law
Sister in law => Brother in law
Spouse ~ Self
Uncle in law <= Aunt in law
Cousin in law
Cousin once removed in law
Cousin twice removed in law
Cousin 3 times removed in law
Great-uncle in law <= Great-aunt in law
Cousin once removed in law
2nd cousin in law
2nd cousin once removed in law
2nd cousin twice removed in law
2nd cousin 3 times removed in law
Great-grandfather in law <= Great-grandmother in law
Great-aunt in law => Great-uncle in law
Grandfather in law <= Grandmother in law
Aunt in law => Uncle in law
Mother in law => Father in law
Uncle in law <= Aunt in law
Great-uncle in law <= Great-aunt in law
There are 2 identical copies of this too.
Great-grandfather in law <= Great-grandmother in law
Great-aunt in law => Great-uncle in law
Grandmother in law => Grandfather in law
Great-uncle in law <= Great-aunt in law
Ex-great-grandfather in law <= Ex-great-grandmother in law
Ex-great-aunt in law => Ex-great-uncle in law
Ex-grandfather in law <= Ex-grandmother in law
Ex-aunt in law => Ex-uncle in law
Ex-father in law <= Ex-mother in law
Ex-brother in law <= Ex-sister in law
Ex-niece => Ex-nephew in law
Ex-nephew <= Ex-niece in law
Ex-sister in law => Ex-brother in law
Ex-spouse ~ Self
Ex-uncle in law <= Ex-aunt in law
Ex-cousin in law
Ex-cousin once removed in law
Ex-cousin twice removed in law
Ex-cousin 3 times removed in law
Ex-great-uncle in law <= Ex-great-aunt in law
Ex-cousin once removed in law
Ex-2nd cousin in law
Ex-2nd cousin once removed in law
Ex-2nd cousin twice removed in law
Ex-2nd cousin 3 times removed in law
The above are derived from the following, where ``child创, ``parent创 and ``spouse创 are the relationships defined (respectively) as
{(a, c), (b, c)}
{(c, a), (c, b)}
{(a, b), (b, a)}
in
a <= b
c
(Someone who shares 3 grandparents with you is your ½-sibling and cousin simultaneously; is there a name for that?)