maribet99Maribeth is a girl's name meaning drop of the sea, bitter, or beloved + oath. Maribeth is the 929 ranked female name by popularity.[ 3 syll. ma-ri-bet(h), mar-ibe-th] The baby girl name Maribeth is pronounced as M EH R-iy-Beh-TH †. Maribeth is primarily used in English and it is of Hebrew orin.