Did the man in the Bible with 12 fingers and 12 toes have a name?

Answer 1

Besides Goliath, there were other unusually large men of the Rephaim, among them being Ishbi-benob, the weight of whose spear was 300 shekels of copper (3.4 kg; 7.5 lb) (2Sa 21:16)
Saph, or Sippai (2Sa 21:18; 1Ch 20:4)
Lahmi, Goliath’s brother, “the shaft of whose spear was like the beam of loom workers” (1Ch 20:5)
And the man of extraordinary size mentioned in 2 Samuel 21:20 having six fingers on each hand and six toes on each foot, but he is unnamed.