Question: Who is the paternal grandmother of Charles James Irwin Grant, 6Th Baron De Longueuil?
Sentence (from "Charles James Irwin Grant, 6th Baron de Longueuil"): Charles James Irwin Grant, only son of Charles William Grant, 5th Baron de Longueuil and Caroline Coffin, was born in Montreal on 1 April 1815.
Relevant evidence: Yes