FILIUS NULLIUSfilius nullius (fil-ee-[schwa]s n[schwa]-lI-[schwa]s). [Latin ¡°son of nobody¡±] Hist. An illegitimate child.
¡ª Also termed filius populi.
¡°I proceed next to the rights and incapacities which appertain to a bastard. The rights are very few, being only such as he can acquire; for he can inherit nothing, being looked upon as the son of nobody; and sometimes called filius nullius, sometimes filius populi.¡± 1 William Blackstone, Commentaries on the Laws of England 447 (1765).