She is married to Peter Ii De Courtenay X.
They got married
Y
Source: FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints
accessed 27 Jun 2016), entry for Yolande Of Flanders, person ID 9WPR-FZH.
_FSLINK: https://familysearch.org/tree/#view=ancestor&person=9WPR-FZH
The data shown has no sources.