Catholic means "universal" and "effecting mankind as a whole". Although today one usually understands it to mean a member of the Catholic Church, it also refers to the "ancient and undivided Christian church or a church claiming historical continuity to it". F. catholique, fr. L., fr. Gr. katholikos.
Suellen Ocean is the author of Secret Genealogy a how-to for tracing ancient Jewish ancestry and Secret Genealogy II, Uncovering the Jewish Roots of Our Christian Ancestors, both available at Amazon, B&N and Ocean-Hose.