Today's reading provides a genealogy of Jesus, which is reminiscent of the beginning of the Gospel of Matthew. A quick comparison, though, shows that the two family trees have different names tracing Jesus' lineage to David. The traditional explanation for this, dating to the early Christian historian Eusebius (who wrote in the early 300s). He said that the genealogy in Matthew was the genealogy of Joseph. This genealogy in Luke is the genealogy of Mary, the mother of Jesus.