When Anna Elisabetha Haas was born on 24 May 1827, in Germany, her father, Joannes Haas, was 33 and her mother, Anna Eipes, was 28. She married Ezra Denison Willson on 19 September 1853, in Brady Township, Kalamazoo, Michigan, United States. They were the parents of at least 4 sons and 4 daughters. She lived in Pavilion, Kalamazoo, Michigan, United States in 1870 and Yankee Springs Township, Barry, Michigan, United States for about 30 years. She died on 8 June 1911, in Barry, Michigan, United States, at the age of 84, and was buried in Bowerman Cemetery, Middleville, Barry, Michigan, United States.