Zweder Van Vianen - Pedigree | FamilyCentral
 Abt 1329 - Bef 1403
 Abt 1285 - 3 Oct 1352
 Abt 1300 - Bef 1 May 1351
 Abt 1255 - 25 May 1318/19
 Abt 1256 - 16 Jan 1317/18
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