pater patris m.
father
frater fratris m.
brother
mater matris f.
mother
soror sororis f.
sister
rex regis m.
king
dux ducis m.
duke
miles militis m.
soldier
pater -is
Third Declension M/F Model Noun
pater patris patri patrem patre patres patrum patribus patres patribus
__, is
Third Declension M/F Case Endings
\_\_ is i em e es um ibus es ibus