Eagle - suggests courage and possibly a military career, symbol for Saint John.

Sword: a military career.
Swords, crossed: Indicates death in battle.
The oak, oak leaves and acorn can stand for power, authority or victory.
The laurel wreath is usually associated with someone who has attained distinction in the arts, literature, athletics or the military. The ivy wreath is symbolic of conviviality (gaiety or joviality). The wreath and festoon together symbolize memory.