You did it!You found them.Whose census records did you search?I was searching Ancestry.com for the couple years I had a U.S. Deluxe account with them; and now I'm wondering what other info are they lacking in their data bases.
In the 1930 Census for Battle Creek Twp, Precinct 8, E.D. 13-17, Sheet No. 12-A, Enumeration Date April 9, 1930, appearing on Lines 14 - 21, 474 Hamblin Ave., there are SEBO(SEPOTZ) Steve, Elizabeth, Steve, Betty, Anna, Johnie, Margarete, Erich.
Immediately below at 478 Hamblin are SEPOTZ Charles, Ella, Irene, Goldie, Louisa, Charles.
Ancestry.com did not come up with a Mike & Anna with son b. 1911 in any census year although I researched SIPOCZ, SIPOTZ, SEPOTZ, SEBO, SIP*, SEP* variations.
I'm guessing the first-born son changed his name;I have photocopy of his baptism record, per LDS Fi1m #1617241, and it is written as Michael for the child, b. 19 Oct., bap. 22 Oct., p. Michael Sipöcz and Anna Csán, godp. Josephus Csán and Rozalia Koczán.No further entry for Mike & Anna family.So they must have moved to Michigan sometime before next child was born.
Thought you would enjoy some of the story.Again, THANK YOU so very much................Viola