Koln, Rheinland, Prussia
- References (4)
- 1245 Individual: Countess Sofie of the Mark (b. 1245 )
- 1249 Individual: Count Eberhard of the Mark I (b. 1249 )
- 1324 Marriage / Union: Emperor Ludwig of the Holy Roman Empire IV & Countess Margaretha of Holland (m. Feb 25th, 1324 )
- 1325 Marriage / Union: Johan Heer van Arkel & Countess Irmgard of Kleve (m. 1325 )