Celeste Silas was born about in NY in 1873 and passed away there in 1953. Somehow his surname was changed to "Miller".
His father was in this record: Year: 1881; Census Place: St Gabriel, Hochelaga, Quebec; Roll: C_13221; Page: 46; Family No: 204. Ancestry.com and The Church of Jesus Christ of Latter-day Saints. 1881 Census of Canada [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2009. Citing Jean Baptiste Legasse.
As to how the last name became Miller, John Jean-Baptiste Meunier Lagace Legasy MILLER in this family tree (need subscription to Ancestry.com) shows it might have been derived from Meunier. 
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Celeste Silas is 25 degrees from Johnny Weissmuller, 30 degrees from Betty Cuthbert, 33 degrees from Fanny Blankers, 30 degrees from Eric Liddell, 25 degrees from Shannon Falconetti, 26 degrees from Michael Phelps, 34 degrees from Gillian Rolton, 29 degrees from Wilma Rudolph, 27 degrees from Alfred Tysoe, 46 degrees from Mina Wylie, 31 degrees from Yvette Corlett and 31 degrees from Isabelle Huth on our single family tree. Login to find your connection.