c. 1200
serviēnsn., Latin
One who serves; a servant of the court or crown.
Present participle of servire, pressed into permanent employment.
Usage note: the serving was compulsory. The spelling was worse.
12th c.
sergentn., Old French
An officer of the court; a man of service; a tenant
holding land by serjeanty, owing his lord a specified duty rather than rent.
Usage note: the duty was specified. Refusal, the record shows, was already a family aptitude.
13th c. to date
Sergeantsurname, English
An occupational surname borne continuously since the
thirteenth century by people who have, to a person, never held the rank.
Usage note: pronounced exactly the way you fear. Spelled the way you hope it is not.
Errata
A recurring error in the record: the current
holder of the name is assumed to hold military rank. He does not, and
never has. Commissions borne by others in the family are real, and are
theirs. The House files this correction on his behalf, and will continue
as long as necessary.