Six
An uncommon surname that may come from the Old English word for a dagger, though the evidence is limited.
The #9,311 most common surname in the United States (2010 Census) — about 1 in every 88,289 Americans shares it.
Etymology
Lower records Six with the suggestion that it may come from Old English seax, meaning a dagger or short sword. That would make it an old descriptive or nickname-based surname, perhaps referring to a weapon, trade, or some association now lost. The fit is plausible linguistically, but the historical evidence in the excerpt is thin, so this should be treated as a likely rather than certain explanation.
History
The name appears to be rare in modern English-speaking countries. Because the surviving source material gives only a brief etymological gloss, there is little secure history to trace beyond its likely survival as a hereditary surname from medieval English usage. In some cases, surnames like this may have been reinforced or reshaped by later spelling simplification.
Origin
Regions
Variant spellings
Fun fact
The Old English seax was also the source of the ethnonym Saxon, ultimately linked to the same weapon word.
From the historical record
“SIWARD. The A-Sax. personal name. SIX. Ferguson says A-Sax. seax, a dagger or short sword. SIXSailTHS. See under Smith. SIZAR. See Sizer. SIZER. A scholar of the lowest degree at Cambridge — a servitor. Bailey. SKI”
— Patronymica Britannica: a dictionary of the family names of the United Kingdom