Beulah on Family Tree Circles

I am researching my family name of "Cox." My daughter and I have found the names of the Cox Family up to the 1700's. There is a Jacob Cox Jr. (1725-1798) who married Elizabeth Merryman (Dec. 13, 1744 Baltimore County, Maryland) (John) Jacob Cox Sr. (1700-1724) married Elizabeth Gaines. We found Thomas Cox who came from England who married Leah -- no dates.