zięć - son-in-law
synowa - daughter-in-law
teść - father-in-law
teściowa - mother-in-law
bratanica - niece
bratanek - nephew
siostrzenica - niece
siostrzeniec - nephew
prabapcia - great grandmother
pradziadek - great grandfather
wójek - uncle
ciocia - aunt
kuzyn - cousin
kuzynka - cousin
;P
