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Male Roy Gilbert Click to view Roy Gilbert in the family tree

Roy was born on August 4th, 1878 in Winchendon, Massachusetts.1   Roy's father was Grove Karl Gilbert and his mother was Fannie L. Porter.  His paternal grandparents were Grove Sheldon Gilbert and Eliza Stanley. He had a brother and a sister, named Archibald Marvine and Betsey Bent.  He was the youngest of the three children.1 

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 4, Ed. 1 @ Tree #0574, 0574.ftw