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Male Lorenzo Dewey Click to view Lorenzo Dewey in the family tree

Lorenzo was born on December 11th, 1881 in Kansas City, MO.1   Lorenzo's father was Simeon J. Dewey and his mother was Olive Caroline McClelland.  His paternal grandparents were Simeon Dewey and Betsey Bigelow Knight; his maternal grandparents were John McClelland and Fanny Moore. He had a brother and two sisters, named Simeon John, Frances Moore and Mira Olive.  He was the youngest of the four children. He had two half-brothers and three half-sisters, named Charles Francis, William Curtis, Lizzie, Alice Mira and Lillie Jane.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