A verb implied by the adjective (passive participle?) onnen “born” as in Abonnen “After-born” (WJ/387). It also appeared as an element in N. ed-onna “beget” in The Etymologies of the 1930s under the root ᴹ√ONO “beget”, but it is not clear whether it could function as an independent verb in this period (Ety/ONO).
Neo-Sindarin: For purposes of Neo-Sindarin, I would use this verb to refer primarily to the actions of the mother = “✱to birth, give birth to”, and would reserve edonna- “to beget” for actions of the father.
An adjective meaning “born” in the name for Men: Abonnen “After-born” (WJ/387). It appears to be a (reduced?) passive participle of the verb onna- “✱to give birth to”.
Conceptual Development: The Gnomish Lexicon of the 1910s had G. nuin “born” (GL/61) based on the early root ᴱ√NŌ “become, be born” (QL/66).