The Ashmolean Latin Inscriptions Project (3); (latininscriptions.ashmus.ox.ac.uk/.):

University of Oxford

Inscriptions including the name: Iohannes

GOLD-GLASS FRAGMENT DEPICTING CHRIST WITH SAINTS
AD c.325-400
glass, gold
AN2007.10

GOLD GLASS FRAGMENT
AD c.325-400
glass, gold
AN2007.12