did you know...
At the time of Childeric's deposition, Pepin, the father of King Charles, held this office of Mayor of the Palace, one might almost say, by hereditary right; for Pepin's father, Charles [Martel 715-41], had received it at the hands of his father, Pepin, and filled it with distinction.
therefore:
the line of eldest sons named their eldest sons after their fathers, so pepin begat charles who begat pepin who begat charles who begat pepin.