A pilot will call "No Joy" when they are unable to locate another plane or potential hazard after being warned by the tower or another aircraft.
He calls his route "The Joy Route"
"in joy" or "with joy"
He calls them forth from the hearts of the faithful.
They are telling you their name is Joy
If you mean Aliza then 'Joy'
"Joie" means "joy" in French.
Joy
mean joy and keep smlie.
You're going to have to expand on this one a bit. Was "Joy Division" a call sign? Example: "Romero 2 this is Joy 7 over?" Because "Joy" sounds like a call sign and not a designated unit. In addition, do you know specifically if this was a naval or land unit (or even an air unit)?
it love and joy
joy
joy