Seeking Info on David Graham C 1791 1865 IN Cadder Scotland Husband of Janet Bowman

David Graham and Janet Bowman's son, David Graham (1818-1879) is my third great-grandfather. He was born and also passed in Cadder, Scotland.

I am looking for anything on his father, David Graham (c.1791-1865). I think I have found my correct Graham ancestors up until this point and then I am unsure. I saw a profile for him say his parents were a John and Martha Graham(no maiden name) but I don't know if this is even true.

So if anyone knows about this line of Grahams, I'd love to hear!