Latin had no "J"s.
That's why Pilate inscribed on the cross:
Iesvs Nazarenvs Rex Ivdaeorvm
Jesus of Nazareth, King of the Judeans.
Did too...
Pilate was educated.. mostly only romans spoke Latin.. the world (in them there parts) spoke koine greek.. so did Pilate so the "people" would understand him.. Most/many rabbis probably spoke latin, Greek and hebrew.. Iesus <- Greek for "Jesus".. more or less.. all the "J's" came during and after 313 ad when the Roman Catholic church was created.. d;-)