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Male Roy Jesse Dewey Click to view Roy Jesse Dewey in the family tree

Roy Jesse was born on April 16th, 1878 in Brest, MICH.1   Roy Jesse's father was Jesse Nelson Dewey and his mother was Adline F. McMartin.  His paternal grandparents were Simeon Dewey and Lydia Higgans. He had two brothers and four sisters, named John McMartin, Donald Bowen, Cloie, Adaline, Floris and Edith Marion.  He was the third youngest of the seven children.1 

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 1, Ed. 1 @ Tree #3310, phelps.FTW, World Family Tree Vol. 4, Ed. 1 @ Tree #2332, 2332.ftw