Looks like they went by surname DENEEN, Michael married an Ellen? or possible Ann Keif (as per Alice's birth registration 2 Apr 1898) Family was in Racine Co. until sometime after the mothers death in Oct 1900, then they went to Waukesha Co. Michael may not have remarried.
children Mary - b. Jun 1891 (1900 census) - haven't found much on Mary Edwin John b. 6 Jul 1892 Waterford, Racine Co,Edwin make have married later to Helen A Stevens 1951 and poss died Jan 1960 Matthew - 20 Jun 1897 d. 11 Sep 1944 bur in Mukwonago married - 1st Rachel died (Mat wid on 1930 census) 2nd - Marie Lueck/Rueck Matthews children - 1)Ernestine 1933- (poss a widow still living in Waukesha use a people search engine for poss address and phone) m- Elwyn Schultz --- 2)Elizabeth (Betty) b. 20 Dec 1935- 26 May 1973 m Harold Geif. 3)Matthew - 14 Jul 1937 - 14 Jul 1995 bur in Mukwonago. m- Bernadine Collins. Using search engine again poss a few Deneen still in Waukesha Co.