The names listed on the stone are the names of people buried there. Multiple people are buried in the same plot. Eleanor Rigby was buried there. The coincide

The names listed on the stone are the names of people buried there. Multiple people are buried in the same plot. Eleanor Rigby was buried there. The coincidence or non-coincidence is indeed of really low importance in the grand scheme of things, and says nothing about McCartney's "freakish memory".