Leonard/Rouka 1880 Minock Coalminers

The Leonard and Rouka families were listed in the 1880 Minock, Woodford Co. Federal Census, living in one household, all men as coalminers. They had immigrated from Ireland in 1880 between Oct-June. Catherine Leonard, 72, was with her three sons, Lawrence(1842), Thomas (1843) Michael(1846)and daughter Ellen Rouka (1850) husband James (1843) and four children, Julia (1875), Martin (1877) John (1878) and Michael(1879). I can find Michael and Thomas Leonard in 1900 in Minock as unmarried coalminers,but cannot find Lawrence Leonard or the Roukas.(or alternate spellings, Roarke, Roache, Rook). Any info on this family? I think Lawrence Leonard lived until about 1901 in Illinois, with possibly a nun as a daughter. Thanks, Mary Corcoran