Frank, died 18 Sep. 1870, Outagamie Co., source: WI Vital Records Death Index, Vol. 1, p101, reel 102, image 2965
Hardy, died 15 May 1871, Outagamie Co., source: WI Vital Records Death Index, Vol. 1, p104, reel 102, image 2983
Bryan, married Mina Roberts 28 Aug 1876 in Grant Co., source: WI Marriages, 1835-1900
Pat, died 26 Feb. 1878, Wood Co., source: WI Vital Records Death Index, Vol. 1, p5, reel 144, image 951
Catherine, died 9 Oct. 1881, Milwaukee Co., source: ibid, Vol. 4, p549, reel 62, image 547
Kate, married Patrick Fitzgerald, Grant Co., Oct. 25, 1883, source: WI Marriages, 1835-1900
Phillip, died May 16, 1885, Winnebago Co., source: WI Vital Records Death Index, Vol. 1, p208, reel 139, image 1792
Michal [sic], married Lizy Bayrns [sic] 15 Jun. 1886, Grant Co., WI Marriages, 1835-1900
I have a number of other references to Coffey in WI. and will be happy to check my files for your Coffey.