Family name origins & meanings
- French : from the medieval female personal name Plaisance, meaning ‘pleasantness’, a feminine form of the much rarer personal name Plaisant (present participle of Old French plaire ‘to please’), of common gender.
- French : habitational name from Piacenza in Italy, Latin name Placentia (see Piacentini).
- French : habitational name from any of a number of places so called in France. This name is found predominantly in LA.