What does byname mean?
A byname is a secondary name given to a person in addition to their formal or official name — essentially a nickname, epithet, or sobriquet that describes, distinguishes, or affectionately labels its bearer. The word carries a distinctly scholarly tone: it appears most often in history, genealogy, and onomastics (the study of names), particularly when discussing medieval naming customs, where individuals were routinely identified by descriptive bynames such as 'the Tall,' 'Longshanks,' or 'the Baker.' Over generations, some of these descriptive tags hardened into hereditary surnames, which means countless family names today — from Armstrong to Smith — originated as medieval bynames. Though less familiar than 'nickname,' byname is the preferred term in academic and historical contexts precisely because it signals this older, more formal tradition of supplementary naming. It is always a countable noun, typically appearing in phrases like 'known by the byname.'
nounA secondary or additional name given to a person, often descriptive or informal; a nickname or epithet, especially one that supplements an official or formal name.
- A secondary, informal, or descriptive name attached to a person alongside their formal name (a nickname or epithet).
- In historical and onomastic contexts: a descriptive element that later hardened into a hereditary surname.
"The outlaw was known to history by the byname 'Little John,' though his real name remains uncertain."
"The Viking leader bore the byname 'the Unruly,' recorded in the sagas."
"Many English surnames began as medieval bynames describing a person's trade, appearance, or temperament."
Standard plural, treated as a regular countable noun.
"The chronicle lists dozens of bynames attached to the town's leading families."
Medieval scribes loved bynames so much that many modern surnames — like 'Armstrong' and 'Coward' — started life as them.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of byname
Byname derives from the prefix 'by-' (meaning secondary, subordinate, or incidental) combined with 'name,' following the pattern of formations such as byway, byproduct, and byword. The construction reflects Middle English use of 'by-' to denote something auxiliary to a primary thing. Its cognates within English include other 'by-' compounds like bylaw, byline, and byword, all built on the same prefix rather than a shared foreign root.
How byname is actually used
Formal register; common in historical, genealogical, and linguistic writing rather than everyday conversation. In everyday speech, 'nickname' is far more common. Bynames are especially discussed in studies of medieval naming practices and surname formation.
Easily confused with byname
A byline is the printed line naming the author of an article, while a byname is a secondary or informal personal name.