Jesus himself, when he began to teach, was about thirty years old, being the son (as was supposed) of Joseph, the son of Heli,
We shall not undertake any exhaustive "harmonization" of the two separate genealogies of Jesus in Matthew and here.  It is now and has been this student's conviction for many years that Luke's genealogy cannot possibly be for Joseph's line at all, since Luke spelled out in the most emphatic manner the fact that Joseph had no physical connection whatever with Jesus; and in this fact disappears any reason why Luke might have written a genealogy of Joseph.