The ‘j’ is pronounced like a ‘j’ because this is the [name_f]English[/name_f] form spelled with a C (Cajétan with the accent is French).
[name_f][/name_f]Honestly though, if I hadn’t looked that up I would have assumed the ‘j’ was a ‘y’, because that’s true of [name_m]Kajetan[/name_m] with a K.