A four letter word for 'jester' is fool.
balatro
The king asked the jester to performed tricks for his daughter's birthday.
The German word for fool or jester with the letter N is Narr, der Narr.
If referring to a "court jester," like in the old days of kings and queens, then another word might be the "town fool," or "tom foolery."
jester
maroon buffoon
道化師 Dōkeshi
the jester ate fish :)
Jester Hairston's birth name is Jester Joseph Hairston.
jester did dance and joke for king and his family
A clown can be added to this list and also the word jester.