types:
descendiente
a person considered as descended from some ancestor or race
consanguíneo
one related by blood or origin; especially on sharing an ancestor with another
familiar
a person having kinship with another or others
cercano
the person who is (or persons who are) most closely related to a given person
hermano
a person's brother or sister
tita,
tía
the sister of your father or mother; the wife of your uncle
pequeño
the youngest member of a group (not necessarily young)
bígamo
someone who marries one person while already legally married to another
niño
a human offspring (son or daughter) of any age
hijo
a member of a clan or tribe
nuera
the wife of your son
primogénito
the offspring who came first in the order of birth
padre
the founder of a family
nieto
a child of your son or daughter
hermanastro
one of siblings who have only one parent in common
monógamo
someone who practices monogamy (one spouse at a time)
sobrino
a son of your brother or sister
sobrina
a daughter of your brother or sister
polígamo
someone who is married to two or more people at the same time
cuatrillizo
one of four children born at the same time from the same pregnancy
quintillizo
one of five children born at the same time from the same pregnancy
yerno
the husband of your daughter
sucesor
a person who inherits some title or office
trillizo
one of three offspring born at the same time from the same pregnancy
gemelo,
mellizo
either of two offspring born at the same time from the same pregnancy
tío
the brother of your father or mother; the husband of your aunt