A squire is the assistant or "right hand" of a knight. According to Maximillian of Northshire, as "hands are especially good at carrying things", the first duty of a squire is to carry a knight's belongings, since "to lug around such etcetera is a job unbefitting for a knight".[1]
Most known squires are human boys, though the title is also seen with orcs, a night elf and even a wight. Many of Stormwind's youth joined the Argent Crusade as squires, hoping to one day serve the Holy Light in battle.[2]
Though many squires of the Silver Hand aspire to one day become knights themselves, many see it as an honor to serve someone who has given themselves fully to the Light.
During the Burning Legion's third invasion, adult squires were recruited into the Silver Hand by Commander Ansela.
Known
Named
Maloric <The Black Knight's Squire>
Squire Artie-
Squire Cavin - Squire Danny
- Squire David
-
Squire Edwards -
Squire Leoren Mal'derath <Stable Master> -
Squire Maltrake 
Squire Percy <Stable Master>- Squire Rowe
- Squire Walter <Gryan's Squire>
-
Taelia <Cyrus Crestfall's Squire>
Unnamed
As a companion pet
[Argent Squire] is rewarded from 
[25-30] A Champion Rises.
[Dutiful Squire] is rewarded to Alliance players from 
[Honor Level 5], or can be bought for 500
from vendors if Level 5 has been achieved on the account.
Trivia
- In Warcraft: Orcs & Humans and Warcraft II: Tides of Darkness, it is a rank you can achieve.
References
- ^ [15-30] An Important Lesson
- ^ [Argent Squire]