I don't have a whole lot on this particular family - but this is what I have: I have his family living in Lafayette, Ogle Co, Illinois in 1860 Census - Rowland would be 3. His parents were Samuel, born 1823 in Canada. Based on the age of the children and where they were born they moved to Illinois from Canada between 1847 and 1855. Children I have are: Henry, Caroline, Phebe, Clarinda, David, Lucinda - Rowland being the youngest.
Sorry I don't have any more - this is not a direct line with my Nettleton's - although they all came from Canada around the same time so they are probably related some how.
Good Luck