Dementas

Cf. Diẽmantas, Diẽmentas, Diementãvičius, Diamentiška, Diementiškà, Diẽmontas, Diemontãvičius, Demeñčius, Dementáuskas, Dementãvičius, Dementievas, Demeñtis, Demeñtjevs, Dijãmentas (see). Most of these surnames probably come from Rus. Дементий, BRuss. Дементей, Ukr. Дементiй or so. ¹ and their derivatives. Only one other, especially from northern Lithuania, can be a Germanism, cf. German Diamant, Demant, etc. ².