Wolfert II van Borselen was a member of a large clan.

[6] That same day they bailed for Jan Mulart van Borselen, and Floris's son Pieter.

[7] Also on 11 October Jan Mulart van Borselen gave the guarantee that he would return to his prison in Delft, and would deliver Frank and Claas children of his brother Wolfert, and Pieter son of Floris.

[8] Obviously the brothers Wolfert II, Floris and Hendrik Wisse were not in Holland when their father was killed, and the same applied to their uncle Raas.

After Wolfert I's death John III, Lord of Renesse had come back to Schouwen.

When he could not come to terms with John II, he left Schouwen and tried to ally with the Van Borselens.

Of the four brothers, Wolfert and Floris were mentioned as knights, Frank and Clays as squires.

[1] On 30 May 1316 Wolfert II made a contract about his father's estate with his brothers Sir Florence, Frank and Claas van Borselen.

[17] This happened before 6 April 1317, because on that day count William referred to his sister as widow of Wolfert van Borselen.