Friedrich [I] Archbishop of Köln donated property to Kloster Rees by charter dated 1112 witnessed by "Henricus dux de Lintburg, Almer advocatus, Hugo, Adolf comes de Safenberk, Advocatus Teodericus, Comes Gerhardus et filius eius Gerhardus…". "…Gerhardus comes de Gelleren et filius eius Gerhardus…" witnessed the charter dated 1117 under which Friedrich Archbishop of Köln donated property to Meregelpe. Friedrich [I] Archbishop of Köln confirmed donations to Kloster Dunwald and shared the Vogteischaft with "comitis Adolphi" by charter dated 1118 witnessed by "…Gerardus comes de Wassenberg […et filius eius Gerardus]…".
Graaf van Gelre. [Friedrich [I] Archbishop of Köln confirmed a donation to Kloster Siegburg by charter dated 1129 witnessed by "…Liberi. Paganus dux, Franco burgicomes, Gerhardus comes de Gelre, Adolfus comes de Monte, Adolfus comes de Saffenberg…". It is unclear whether this document refers to Gerhard [I] or Gerhard [II].] The Kronik van Arent toe Bocop records that "Gherit" was installed as "grave van Gelre" in 1107 and died in 1131, adding that he married "greve Floris van Hollants dochter". The last statement does not appear consistent with other sources.
The necrology of Wassenberg records the death 24 Oct [1131] of “dominus Gerardus Longus comes Gelrie, qui fuit fundator et dotator huius ecclesie in Wassenberg”. 1
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