[3-4] í lífi líkastr guði ríkum ‘in life most like almighty God’: The author alludes to Thomas’s cognomen ‘Didymus’ (= δίδυμος, the Gk equivalent of Hebrew ‘Thomas’), i.e. ‘twin’, used as an alternative name for the Apostle in John XI.16, XX.24, XXI.2. This byname gave rise to a tradition that Thomas was Christi geminus ac similis saluatoris ‘a twin of Christ and like our Saviour’ (IO 73, cf. Brev. 4/1).