Quenthin

Quentin is derived from the Roman cognomen Quintinus, which was itself a diminutive of Quintus. Quintus literally means 'fifth' in Latin and was traditionally given to the fifth-born child in a family. The name gained popularity in France as Quentin and was brought to England by the Normans. It has seen various spellings over centuries, including Quenten and Quinton.

The spelling 'Quenthin' is a less common variant, likely a phonetic or idiosyncratic spelling that emerged from the more established 'Quentin'. While 'Quentin' has a clear historical lineage, 'Quenthin' does not have a distinct etymological origin separate from its root in Latin 'Quintus'. It maintains the same meaning and historical associations but is a more modern or unique adaptation.