Carl Zastrow and Sarah (Eichhorst) Zastrow had several children (listed below, but not in order):
Stella Martha Alma ZastrowbornJan. 28, 1916 A sponsor to her baptism was Otto Zastrow, who was born Dec. 12, 1879.
Elmer Carl Richardt Zastrowborn Mar. 4, 1895 A sponsor to his baptism was Herman Zastrow.
Carl Eduard Friedrich Zastrowborn Jun. 18, 1896 A sponsor to his baptism was Eduard Zastrow.
Clarence Herman Georg Zastrowborn Mar. 29, 1908
It looks like the family lived in the township of Holland, Wisconsin for that period of time.
Earl Elmer Roy Zastrow was born Jun. 7, 1921 to Elmer and Esther (Bleibaum) Zastrow.A sponsor for Earl's baptism was Carl Zastrow.
All the Zastrows I ran across appear to be related.I did run across an older female who died.Perhaps the mother of the older Carl (the one married to Sarah) and Earl?Her name was Auguste Zastrow.She was born March 16, 1850, and died August 15, 1892.
Since Auguste is the only person I see listed, who has died, I assume her husband either preceded her in death, or moved from the area.
I hope this is the information you were hoping for, and that it helps you in your search.Holland is in Eastern Wisconsin, south of Green Bay.