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Found a family tree on familysearch.org that states Samuel B Tomlinson's first wife was Emaline the sister of Cassandra. They had two children..... gives names of Cassandra's parents and grand-parents...click on link below
marriage of Samuel and Emily
marriage of Samuel and Cassandra
Dear Ms. Olekas,
Thank you for posting your request on History Hub!
We suggest that you search the Ohio Obituary Index as well as the Portsmouth Public Library | Local History databases for any about your Tomlinson family from that era. As parental name usually are listed on birth records, we also suggest that you review this information from the Archives & Library of the Ohio History Connection and search the FamilySearch Research wiki for Ohio Vital Records and Scioto County, Ohio Genealogy for more resources as to where his birth information may be recorded.
We hope this is helpful. Best of luck with your family research!