Crossword puzzle clue "family nicknames"

MAMA, a child's name for mother, also MAMMA, MAMMIE, MAMMY

MAMMA, (Latin) the milk gland, the breast

NANA, (Australian slang) an idiot, a fool

(French) a step

AGNOMEN, (Latin) a name added to the family name, generally on account of some great exploit, as Africanus to Publius Cornelius Scipio