Could this be his family? 1900 census for Milford, New Haven Co, CT: MOORE, Patrick b. Mar 1857 in Ireland, married 19 yrs, immigrated 1881, both parents b. Ireland wife Mary b. Nov 1859 in Ireland, 13 children born, 10 children living, immigrated 1884, both parents b. Ireland son Michael b. Aug 1883 in Ireland son John b. May 1885 in CT son Daniel b. June 1887 in CT dau Annie b. Oct 1888 in CT dau Mary b. July 1893 in CT dau Lizzie b. Nov 1894 in CT dau Margaret b. June 1896 in CT dau Catherine b. Jan 1898 in CT son Edward b. Jan 1899 in CT son Joseph b. May 1900 in CT
In 1910 Patrick is a widower with children John, Daniel, Annie, Elizabeth, Margaret, Catherine, Edward & Helen (age 9) still at home.
There's a WWII draft registration card for a Michael Joseph MOORE who was born 29-Aug-1883 and was living in Milford, CT in 1942.This could be the oldest brother.If so, in 1910 he was in Milford with wife Josephine, children Michael F. age 3 and Mary E. age 2.