The Beltrán de Heredia coat of arms, from the lineage of Ilarraza and its line of Guipúzcoa to where it spread, is organized as follows:

Coat of arms divided in four parts.

• 1st. and 4th. part - In a golden country side, a walking wolf, of sable.


• 2nd. and 3rd. part - In a azur country side, a golden ribbon, with a golden star on top and a golden lis flower on bottom.