Ruddiman Brothers Who Emmigrated to US About Mid 1800 S

My 3x G.Grandfather Alexander RUDDIMAN born 1821, had 3 brothers, William born about 1823, John about 1826 and James about 1830. They had a sister Barbara. All were born in Aberdeen, Scotland. Their parents were John RUDDIMAN 1798 & Barbara MENNIE 1801.
John, William and James emmigrated to the US about mid 1800's.
I'm searching for any information on their life out there and any known decendants of the brothers of Alexander.