Whakaotihia te rerenga e whai ake nei: I te tau 1558 i Antwerp, i marenatia a Tishem ki tetahi wahine pouaru me te kaihokohoko whai rawa me te kaiwhakawa, a Wouter Gruter (he "Walterus", "de Gruytere", me etahi atu), no Breda i whanau mai. E wha a raua tamariki, ko Jan i whanau i te Tihema 1560. I hainatia e tana tahu te Whakaaetanga o nga Nobles i te 1566, a, ki te rere i te whakawakanga i te Netherlands Spanish, ka neke raua ki te hapori whakaraunga Calvinist Dutch o Norwich. Ko etahi o nga korero mo Jan Gruter e kii ana ko Tishem no Norwich ia, ahakoa ko Thijsmans / Thysmans he ingoa rangatira Flemish. I te wa i uru ai ta raua tama ki te Whare Wananga o Leiden hou i Holland i te 1578/1579, ka hoki a Catherine raua ko Wouter ki Antwerp, engari ko te
Na te whakapae o Antwerp i te tau 1584 i rere ano ratou, i tenei wa ki Lübeck ka rere ki Gdańsk. I mate a Wouter Gruter i Gdańsk i te 1588, ana, e ai ki a Peter Fuchs, i mate a Catherine i te 1595.