Henry Alexander,b 1839, is the brother of my ggg-grandfather, Thomas Alexander, b 1831.Their father was David, b 1790, son of Thomas, b 1750/1760, Ireland (?), son of David, b 1720/1740, Scotland (?). I have a cousin who has done extensive research on the Alexanders. If you have not been successful in your search he might be able to help you. If you would like further contact you can call me at "Booger's"!Who'd a thunk-it!It's a "small" world!