Very early 12th cent. From Latin iam 'id.'
From Proto-Italic *iām "as far as this is concerned." From Proto-Indo-European *h1i̯-h2m "this," in the accusative case. Probably from *īm "he," "she;" the *h2 added via analogy with other pronouns.
Asturian yá, Portuguese já, Galician xa, Catalan ja, French jà, Italian già