From over the seas, i Merica, I have enjoyed your brother John's music over the years.I have heard him live on Prarie Home Companion, on National Public Radio, in the U.S.
I have always been intrigued about a possible family connection.
I am the great great grandson of Cornelius McCusker and Janet Whamond, married in Glasgow in 1863, and who livedall around the place, especially in Springburn, until his death in 1877. His employment was listed as Chemist's Assistant. Janet returned to her home in Angus, then emigrated to America, (Rhode Island) in 1883, with six children.
Cornelius had a brother Bernard.They were from County Fermanagh, and had emigrated to Scotland sometime in the mid-1800s. (Probably during or after the Great Famine.)
I understand that McCuskers are thick on the ground in Scotland, and there is a good chance that we are not immediately related.Nevertheless, tell your brother that he has a fan in South Florida, who might even be a cousin.