Ku qor sii wadida cutubkan - Sanadkii 1558 magaalada Antwerp, Tishem wuxuu guursaday nin ganacsade ah oo carmal ah oo taajir ah iyo garsoore, Wouter Gruter (sidoo kale "Walterus", "de Gruytere", iwm.), asal ahaan ka yimid Breda. Waxay dhaleen afar carruur ah, Jan wuxuu dhashay bishii Diseembar 1560. Ninkeeda wuxuu wada saxiixay Heshiiskii Nobles ee 1566, si ay uga baxsadaan dacwad ka dhan ah Nederlandka Isbaanishka, waxay u guureen jaaliyadda qaxootiga ah ee reer Holland ee Norwich. Qaar ka mid ah taariikh nololeedka Jan Gruter waxay sheeganayaan in Tishem asal ahaan ka timid Norwich lafteeda, in kasta oo Thijsmans / Thysmans uu ahaa magac qoys oo caadi ah oo Flemish ah. Markii wiilkoodu isku qorey Jaamacadda cusub ee Leiden ee Holland 1578/1579, Catherine iyo Wouter waxay ku noqdeen Antwerp, laakiin Duulaankii Antwerp
Sanadkii 1584 waxay mar kale ka qaxeen, markan waxay tageen Lübeck kadibna Gdańsk. Wouter Gruter wuxuu ku dhintay Gdańsk sanadkii 1588, iyo, sida uu qabo Peter Fuchs, Catherine wuxuu ku dhintay 1595.