William married Caroline Sweetapple in 1870. Caroline (daughter of Charles Sweetapple and Sarah Lickman) was born on 23 Apr 1849 in Colden, Erie, New York; died on 22 Jun 1938 in Orangeburg, Orangeburg, South Carolina; was buried in Little Rock, Pulaski, Arkansas. [Group Sheet]

1. William H. Haas was born in Feb 1871 in New York; and died.
2. Fredrick Peter Haas was born on 22 May 1876 in New York; died on 21 Jun 1969 in Darlington, Montgomery, Indiana.
3. Nellie Caroline Haas was born in Mar 1879 in Colden, Erie, New York; died in 1910 in Helena, Phillips, Arkansas.
4. Harry Forest Haas was born on 10 Mar 1885 in Ohio; and died.