Who is Jochum Hosewinckel from Anecdotes of Destiny ; and, Ehrengard and what is their importance?

Jochum Hosewinckel appears in "Tempests". He is the owner of the ship Sophie Hosewinckel. Jochim is friendly to Malli, but he is troubled over his old age. It is Jochum who tells Malli the story about his honest ancestor, Jens Aabel.