I'd think both Tyr and Thal would be decent shortened/nicknames, unless you want a specific meaning to go with those as well.
Martiallais Heuloix - Duty. Honor. Faith.
Armand Tremaux - Justice, like lightning.
"We're all snowflakes in a great blizzard." - Virara 2017
Armand Tremaux - Justice, like lightning.
"We're all snowflakes in a great blizzard." - Virara 2017