I apologize, I didn't realize how much information was available. Actually this is the first time I have found anyone with information.
His name was Donald McMillan although he shows occassionally as McMullen. He was born in Canada or Scotland, (on his pension records gives both) He died at the Soldier's Home in WI. I believe his brothers names were James, Allan Robert and Donald. I have no further info with the exception, that I believe one was with him in the Soldier's Home. He served on the USS Ohio that sailed from Charlestown MA. in 1846.
As I had said I was not aware that such a list as you have existed, if I could access it I wouldn't be such a bother.