a proper child: That is, a fine, beautiful, or fair child, as our translators render αστειος [Strong's G791] in Act 7:20; which was in their time the sense of proper, from the French propre.
and they: Heb 13:6; Psa 56:4, Psa 118:6; Isa 8:12-13, Isa 41:10, Isa 41:14, Isa 51:7, Isa 51:12; Dan 3:16-18; Dan 6:10; Mat 10:28; Luk 12:4-5