|Children|| Dominique Grumby|
|Cause of Death||Shipwreck|
Tumberink was the son of Jonas Grumby, believed to have been sired during his travels after leaving Paco. The identity of his mother is unknown but is believed to have been a woman from either Guilder or Grizzland. After his father's death he was brought to the Jewelled Cities by Marius Earthguard and Giorno Fiassa, arriving during the 50th Anniversary Party.
He married Huang Pei Mei, a notorious Salterri pirate. They had three children- twins Dominique and Emmanual, and a younger son Philip. He died in a freak hurricane in 476 along with a number of other members of his family.