Coat of arms of the Bishop Martin Drennan, Bishop of Galway and Kilmacduagh.
The motto Comhoidhrí le Críost (co-heirs with Christ) is from Saint Paul's Letter to the Romans (8:17) where he emphasises the dignity and sure hope of a great destiny which are given to the followers of Christ.
The coat of arms draws attention to aspects of the joy of our Christian identity. In the centre is the Bible, opened at the beginning of the Gospel of John. The word of God offers a continual reminder to Christians of their deepest identity.
The fleur-de-lis at the top left is a symbol of the Blessed Virgin who grasped the full implications of her dignity as someone chosen and loved by God.
The Celtic Cross on the right is a reminder of our history and links with generations of Irish people who have gone before us.
At the bottom is a flowering blackthorn, making a connection with the family name Drennan (Ó Draighneáin).
Reference:

www.galwaydiocese.ie
Own work
SajoR