famille « she has gone to live with her husband's kin. » kith and kin = parents et amis « his loyalty, he said, was first of all to his own kith and kin. » next of kin = parent le plus proche « we have notified their next of kin (=nous avons avisé leurs proches). » "next of kin" (on forms) = "nom et prénom de votre plus proche parent".