(transitive, archaic) To adopt as son or daughter.
instead of making you the Request I intended, I do here desire That the Child be filiated upon me, Laurence Sterne, Prebendary of York, &c. &c. And I do, accordingly, own it for my own true and lawful Offspring.
(transitive, archaic) To establish filiation between (see "filiation" for the many senses).