The Chronologia Johannes de Beke names "Florencium succedentem comitem et Machtildim" as children of Count Dirk V & his wife. The Annales Egmundani name "Florentius II filius eius [= Theoderici V comitis]" when recording that he succeeded his father.
He succeeded his father in 1091 as FLORIS II “the Fat” [Count of Holland]. He acknowledged the Bishop of Utrecht as his overlord while retaining the rule of his county. The first recorded mention of the title "Count of Holland" is found in the charter dated [May 29] 1101 under which Burchard Bishop of Utrecht granted the church of "Thiedradeskerke" to Utrecht Sint Jan, witnessed by "…Florentius comes de Hollant, Heinricus de Kuc, Herimannus de Merehem, Wichardus comes…". "Florentius…Hollandiensis comes" granted fiscal exemptions to "civibus Heylegommensibus" {citizens of Heilo} by charter dated 13 Apr 1108. "Florencius dictus crassus…cum…coniuge sua Petronilla" donated property to Egmond by undated charter which also records that "Nobilis Petronilla, super maritum mortuum" donated additional property for his soul.
The Annales Egmundani record the death "1121 VI Non Mar" of "Florentius crassus comes filius Theoderici". The Chronologia Johannes de Beke record the death "1121 VI Non Mar" of "Florencius comes Hollandie, confrater ecclesie Traiectensis" and his burial at Egmond. Beke's Egmondsch Necrologium records the death "1121 VI Non Mar" of "Florencius 2 Hollandie comes". 1
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