thirdborn
threeling
triplet
firstborn
uterine
give birth
secondborn
middleborn
half-first cousin
paternal cousin
maternal cousin
wombchild
full-brother
multiple
onlyborn
stepbrother
birth
first cousin
out of
half-cousin
natural child
parental unit
brother
crotch fruit
trigeminous
biological parent
grandoffspring
afterborn
crotch dropping
nextborn
mameluco
adult third culture kid
quad
lastborn
love child
sesquiple first cousin
foster son
irregular double first cousin
produce
foster-son
second cousin
childbearer
mamaji
uterine sibling
increase
consanguine
pikkie
theyby
birthparent
foster daughter