A major Norman landholder recorded in Domesday Book. His Lincolnshire holdings included the estate recorded under Herdertorp, which Massingberd identifies with the later Ingoldmells-cum-Addlethorpe manor.

The association with Addlethorpe and Ingoldmells depends on the historical identification of Herdertorp and Guldelsmere.

Research sources:
- W. O. Massingberd, Court Rolls of the Manor of Ingoldmells in the County of Lincoln, 1902, Introduction, pp. viii-x; discussion of the Domesday Book entry for Herdertorp and Guldelsmere. — https://en.wikisource.org/wiki/Court_Rolls_of_the_Manor_of_Ingoldmells_in_the_County_of_Lincoln/Introduction
- Wikipedia biographical reference — https://en.wikipedia.org/wiki/Robert_the_Despenser