The name Elmodam (also Elmadam) appears only in Luke 3:28, in the genealogy of Jesus Christ. It is the name of an ancestor of Jesus through the line of David and Nathan.
Luke's genealogy traces Jesus's lineage all the way back to Adam — and ultimately to God — through a line that differs from Matthew's. Where Matthew traces the legal royal line through Solomon, Luke traces through Nathan, David's other son, providing what many scholars believe is Mary's physical genealogy. Names like Elmodam appear only in this genealogy; they are otherwise unknown in Scripture. But their theological significance is enormous: the Incarnate Son of God has real human ancestors, real human generations, real human names that connect Him to the full sweep of human history. The genealogy is a theological statement: the Word who was in the beginning (John 1:1) entered the particular, the local, the named. Jesus is not a mythological figure but the child of specific people in specific generations.