More Info Please on My 3x Grandfather Frederick Mertz Ii Who Died Aboard the Ship as It Got to the New York Shore

I am at a dead end.

My Great Great Great Grand Father Frederick (Martz) Mertz Sr.

His son is Frederick Martz III married to Sophia Hennerdine.
I would like more info on Sr. also and his dad & mom (If known)
Who he married and when he came to the USA (abt 1820??) What was the name of the ship, etc.? The ships roster!
How old was F M III when he set sail with his dad. How many came with the family?

Thanks very much.

Keith March