Delos Clow was the son of David Z. ClowDavid and his wife, Sarah. They were living in Door Co. Wisconsin at the time of the 1860 & 1870 US Census, with their children; James, Fred, Oscar, Madora, Delos, Byron, David and Sarah.
They moved to Cryistal Lake, Illinois in 1872 or 73. David Z., his sons James M. and Oscar were the Captains of ships on the Great Lakes.
Check my site at Rootsweb for what I have on the family.