Filius
A Dictionary of Law · Henry Campbell Black · 1891
A Dictionary of Law
Lat. A son; a child, A distinction was sometimes made, in the olvil law, between “flit” and “liberi;” the latter word including grandchildren, (nepotes,) the former not Inst. 1,14, 5. But, according to Paulus and Julianus, they were of equally extensive import, Dig. 50, 16, 8£; Id. 50, 16, 201. Filius est nomen natures, sed heres nomen juris.
1Sid.193.
Son isa nameof nature, bub heir is a name of law.