abavia – 2nd great grandmother, female ascendant in the fourth degree
abavus – 2nd great grandfather, male ascendant in the fourth degree
abnepos – 2nd great grandson, male descendant in the fourth degree
abneptis – 2nd great granddaughter, female descendant in the fourth degree
adnepos – 3rd great grandson, male descendant in the fifth degree
affines – relatives by marriage, in-laws
affinitas – relationship by marriage
agnati – paternal relations
agnatus – related by blood on the male side
alimenta/o – provision made for made for younger sons or unmarried daughters
alius/a/ud – other
alter/era/erum – the other of two
ambo/ae/o – both
amita – father’s sister, aunt
amita magna – grandfather’s sister, grandaunt
amita uxoris – wife’s father’s sister
anima – soul, spirit
annus – year
anno – in the year
anno Domini – in the year of the Lord
arbor consanguinitatis – family tree
atavus – 3rd great grandfather, male ascendant in the fifth degree
avunculus – mother’s brother, uncle
avus – grandfather
avi (pl.) – grandparents
avi relicta – grandfather’s widow