My gandmother was Lena Marie Henning (b. Nov.29, 1870 ??)who married Frederick William Seitz, Sept. 28, 1893 in Roseville, Michigan (a suburb of Detroit).She was the daughter of Charles Henning and Louisa Wolff.Upon marriage they live in Detroit. she die early in life due to a flu epidemic.
Their Children were Grace, Alice, Gordon (my father), Clifford.
Expect that they is a connection in the Detroit area as Henning is a rare name in the area.