Ysabeau Nyeulants, joncfr. 123r
Ysacxss., Aernt 30v, 33v, 42r
Ysbrant Diricxs. Groenesteyn 201v
Ysbrant Geritss. 156v
Ysbrant Mathysss. 204v
Ysbrant Willemssen 30r, 175r
Ysbrants, Cornelis 140v, 159v
Ysbrantsz, Lenert. 54v, 67v, 76v, 88r, 96r, 99v, 116r, 119r, 148r
Yserman (huis in de Venestraat) 196v