Old French

Noun

quatroun m ‎(oblique plural quatrouns, nominative singular quatrouns, nominative plural quatroun)

1. (Anglo-Norman) quarter of a pound
2. (Anglo-Norman) twenty five (literally, quarter of a hundred)

Descendants

• English: quartern (borrowed)

References

• quarteron on the Anglo-Norman On-Line Hub
• “quarteron” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).