c.1200, title placed before a name and denoting knighthood, from O.Fr. sire
, from V.L. *seior
, from L. senior
"older, elder" (see senior
). Standing alone and meaning "your majesty" it is attested from early 13c. General sense of "important elderly man" is from mid-14c.; that of "father, male parent" is from mid-13c. The verb meaning "to beget, to be the sire of" is attested from 1610s, from the noun.