trá (thrá)
Definitions (by source)
now (as a mere connective or expletive), 1935, 4808. Al. thrá, 1244, 4130.
Desiderius, otherwise called Sgáthán an Chrábhaidh. Editor: Thomas F. O’Rahilly.
then, indeed, so, now.
Stories from Keating's History of Ireland. Editor: Osborn Bergin.
indeed; thrá, quidem, 902
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.