John Domm/Dahm/Dohm-Germany to U.S.

c. 1850?
John Domm/Dohm/Dahm
m: Mary White (from Ireland)
Settled in Seneca, IL.
John, was an Innkeeper/Tavern owner.
John & Mary, had a son named George Domm, who married, Irma Norton in March, 1912 at Joliet, IL.
George was a Mason/brick layer.
George & Irma, had a daughter named Irma Mae, who married Gerald F. Derry Sr. (my mother & father.

Please help me crumble this wall. Any info. would be greatly appreciated.
Thankyou,
D. Doc Derry