So the Keohanes can claim George M Cohan as one of their own... I found the website below which has info on George M Cohan's father, Jeremiah, and grandparents, Michael Keohane and Jane Scott...Still not sure of my Healy link to the Keohanes but will keep digging... Thanks for your replies.
http://www.irishheritagetrail.com/jcohan.htmAlso, in case the site above disappears, I copied the text from it below. Note there is a photo on the website as well.
WHO DESERVES A MEMORIAL
Jeremiah Cohan
Jeremiah Cohan was born on Blackstone Street in Boston on January 31, 1848, the son of Michael Keohane and Jane Scott, both emigrants from County Cork. He started with a trade, working as a saddle and harness maker and also serving as a Surgeon's orderly during the Civil War. But he was particularly fond of Irish dances he learned as a youngster, and he eventually developed an act, performing Irish steps and also playing the fiddle and the harp. He began touring with minstrel shows, and met his wife, Nellie Costigan of Providence, Rhode Island. They married in 1874 and went on the road together. They formed a Hibernicon, described as "a form of Irish vaudeville featuring songs, dances and rapid fire sketches." For a time Patsy Touhey the piper traveled with the troupe in 1886-87.
Jerry and Nellie had two children, Josephine and George, and both were brought into the music business as children, with George getting his own fiddle when he was about four or five. They formed a group they called the Four Cohans and continued to travel on the vaudeville/minstrel circuit throughout the 1880s. In 1893 son George left the family show and made his way for Broadway in New York City, where he became one of the leading entertainers of the early 20th century. Between 1900 and 1940, George M. Cohan produced 84 Broadway and Off-Broadway productions. Many of them featured the Four Cohans, along with other actors like John Barrymore, Douglas Fairbanks, Chancey Olcott and Spencer Tracey.
While George M. Cohan became the toast of Broadway, his father Jerry remained one of the most popular and well-respected men in the theater industry.