Brian

Where the name comes from

• Celtic (Origin uncertain)
  Origin uncertain. Proposed: ‘high, noble’ (via Proto-Brythonic *brigonos); older view: ‘strong’
  possibly Proto-Brythonic *brigonos
  Origin uncertain. The Dictionary of Medieval Names from European Sources calls Brian “of uncertain origin, possibly related to Proto-Brythonic brigonos ‘high, noble’.” Charlotte Yonge (1884) glossed it as Irish/Celtic for “strong.” Historian Seán Duffy (2013) notes that when Brian Boru was born, the name was found not in Ireland but in Brittany, where it was regular among the Breton nobility; on that view it reached Ireland from Breton.

Brian across traditions

• Irish. Made famous by Brian Boru, high king of Ireland from 1002 to 1014, who died at the Battle of Clontarf in 1014. Duffy writes that the name was “hitherto unknown in Ireland” before his time; the Irish surname Ó Briain (O’Brien) is formed from it.
• Breton and French. Duffy notes the name “occurs regularly among the families of the Breton nobility” in the 10th century. Yonge lists the French form Brien, and medieval French Latin records have Brianus in 1258.
• English. Recorded in England from 1185–86 (Latin Brien’, Brianus); Bryan appears in English records by 1530. Duffy attributes medieval English use to Breton landholders who arrived with the Norman Conquest, not to Ireland.
• Danish. A modern Danish given name: Denmark’s name register counts more than 22,000 men named Brian.
• United States (SSA). 1,515,456 combined births in the SSA decade tables, 1950s–2010s (Brian 1,140,309 + Bryan 375,147). Peak decade: the 1970s (393,998 births), when Brian ranked #8 and Bryan #46 among boys. Top 100 in every decade from the 1950s through the 2000s. In the 2010s, Bryan (#153) ranked above Brian (#174).

Who carried it

• Brian Boru (Brian) (941–1014): High king of Ireland 1002–1014; killed at the Battle of Clontarf, April 23, 1014
• Brian mac Máelruanaid (Died 1004): King of Iar-Chonnachta; per Duffy, the only contemporary of Brian Boru known to bear the name

Forms in other languages

Bryan, Brien, Brianus

Brian in letter-number systems

Hebrew, Greek and other traditions gave every letter a number, and read meaning into the totals. These are the counts, computed; the readings are inside the Innerverse.