George Michael Cohan was a son of Jeremiah Cohan and Nellie Costigan.
George Cohan's first marriage to Ethelia Grace Fowler

George Michael Cohan and Ethel Grace Fowler married on 10 July 1899 in Atlantic City, New Jersey
George Cohan's second marriage to Agnes Elizabeth Mary Nolan

George Michael Cohan and Agnes Elizabeth Mary Nolan married on 29 June 1907 in Deal, Monmouth, New Jersey.
GEORGE M. COHAN WEDS.
Married to Actress Agnes Nolan by a Jersey Justice of the Peace.
George M. Cohan, who is playing in "The Honeymooners" on the roof of the New Amsterdam Theatre, was married to Agnes Nolan of Brookline, Mass., at Freehold, N. J., yesterday by a Justice of the Peace. The wedding had been announced for July 4, but on Monday last the couple made their arrangements for an earlier marriage. Miss Nolan, who is 22 years old, is the daughter of Mr. and Mrs. F. J. Nolan. For three years she had been on the stage .... ago she played in "George Washington, Jr."
An automobile accident last Monday detained the couple, who were taking a short trip, for several hours in Freehold, and during that time they decided to get married. They returned to Freehold yesterday and were married by the Justice. Samuel Harris, Mr. Cohan's partner, and Alice Nolan, a sister of the bride, were the only witnesses. The couple returned to New York in an automobile, reaching the city in time for a dinner given them at their new apartments in Thirty-fifth Street by Mr. Harris. Last night Mr. Cohan played his regular part in "The Honeymooners. On his first appearance he was loudly applauded. He made a brief speech.
Mr. Cohan's first wife was Ethel Levy. They were divorced last February.