Hi,
Rachel Christine!
MARKEL is not used in Germany any more. Seibicke's Historical Dictionary of first names has: pet form of names starting with
Mark-
REMINGTON means "from Rimington", Lancashire; ("Farmstead on the boundary stream")
RHETT is explained differently by Hanks & Hodges (1992): "from Dutch 'de Raedt', from Middle Dutch 'raet' (advice)" (invented by
Margaret Mitchell)
RIGOBERTO is from
German RICHBERT (rich/realm + bright/famous)
Andy ;—)