I struggle to know what I can or cannot call my period character’s family members, so I made myself a cheat sheet.
Mother
mamma 1570s or earlier
mama 1707
mum 1823
mummy 1839
mommy 1844
momma 1852
mom 1867
Father
dad, daddy 1500 or earlier (universal, probably prehistoric)
papa 1681
pa 1811
pop 1838
poppa 1897
Sister
sis 1650
sissy 1846
Brother
bro 1660
bubba 1860
Grandmother
granny 1660
grandmamma 1749
grandma 1793
gran 1863
Grandfather
grandpappa 1753
granddaddy 1769
grandpa 1814
granddad 1819
nana 1844
grandpappy 1853
grandpop 1860
gramp 1898
Extended family
auntie/aunty 1787
coz 1550
cuz 17c.
Compiled from http://www.etymonline.com
