Another group having high percentages of the Rh-Negative blood factor are the Oriental Jews of Israel, which is unique because among the Chinese and Japanese, it is almost non-existent, maybe one out of a hundred people.
Suellen Ocean is the author of Secret Genealogy – A How-to for Tracing Ancient Jewish Ancestry, Secret Genealogy II – Uncovering the Jewish Roots of Our Christian Ancestors and Secret Genealogy III – From Jewish Anglo-Saxon Tribes to New France Acadians. Available here:
Secret Genealogy II: http://www.amazon.com/Secret-Genealogy-II-Christian-Ancestors/dp/1484053222
Secret Genealogy III: http://www.amazon.com/Secret-Genealogy-III-Jewish-Anglo-Saxon-Acadians/dp/148407579X