a daughter (is it just "fi" or "pitit fi")?

daughter → pitit fi
son → pitit gason
boy → ti gason
girl → ti fi

man → nonm, mesye (also misye, msye, or mouche), nèg, monkonpè (or konpè), frewo, jennonm (for younger and for those who feel young), lepè (for older and for those who feel old)

woman → fanm, fi, madanm, dàm, sò, kòmè, makòmè

Young woman → demwazèl (matmwazèl, mademwazèl, or manmzèl), sò, kòmè, jenn dàm, jenn fanm, and jenn fi, and also fanm, fi, or dàm 

older person → granmoun, pèsonaj, grandèt

Older woman → grann (also means grandmother)

Older man → lepè, granpè (also means grandfather)

baby → bebe, ti bebe, ti katkat

child / kid → timoun, pitit, ti pitit