Definition
De monte pessonis is a Latin locative surname formula meaning "of" or "from" the hill (or mount) of Pesson — a place-name identifier used in medieval English legal records to distinguish individuals bearing the same given name by reference to their place of origin or territorial association. It appears in historical legal documents, rolls, and writs as part of a personal name, functioning as a geographic surname in the manner common to Norman and post-Conquest English record-keeping. The term is not a legal concept with operative doctrinal meaning but rather a proper name element whose appearance in a legal source signals a specific individual rather than a rule or principle.
Common Confusion
Researchers encountering de monte pessonis in a medieval roll or writ may initially read it as a Latin legal phrase with substantive meaning — a writ type, a jurisdictional designation, or a formulaic term of art. It is none of these. It is a personal surname in Latinized form, equivalent to the anglicized surnames Mompesson, Mompessone, or similar variants. Burrill's entry groups it with cognate surname forms — de Puteaco (Pudsey), Pusac — confirming that this is a cluster of place-derived Norman surnames appearing in Latin record form, not a legal doctrine or procedural formula. Confusing it for operative legal language would send a researcher down an unproductive search path.
Why It Matters in Research
The practical research value of this entry is identification, not doctrine. Medieval English legal records — plea rolls, patent rolls, close rolls, and the Year Books — routinely render personal names in Latinized form, and locative surnames of Norman origin are particularly prone to corruption, variation, and near-unrecognizable alteration across manuscripts and printed editions.
A researcher encountering "de Monte Pessonis" in a primary source needs to know three things: (1) this is a person's surname, not a legal term; (2) the anglicized form most likely to appear in later sources and indexes is Mompesson or a close variant; and (3) searching only one spelling will miss related records. The Burrill grouping of de Puteaco (Pudsey) and Pusac alongside this entry is itself a research tool — it flags a set of Norman locative surnames that appear in similar legal contexts and may identify members of the same family across different documents.
Researchers working in the Law Mind corpus who encounter this term in a primary source cross-reference or footnote should treat it as a pointer to an individual, then use the anglicized variant to search secondary literature, biographical dictionaries, and rolls indexes.
Historical Dictionary Support
Burrill's Law Dictionary entry is minimal — little more than a notation grouping de monte pessonis with cognate surname forms: de Puteaco (glossed as Pusac or Pudsey) and Mompesson. This is characteristic of Burrill's treatment of Latin surname variants, where the goal is identification and cross-reference rather than definition. Burrill does not explain the place-name origin, provide historical context, or cite specific documents in which the name appears. No other historical dictionary in the standard reference shelf (Bouvier, Black, Tomlin, Jacob) appears to carry this entry, which confirms it was recognized as a proper name variant rather than a term of legal art warranting doctrinal treatment. The Burrill entry's value is entirely in the synonym cluster it provides.