Essentially, The Official English names for The Yo-kai Watch Arcane (Elder), Summer Adams (Natsume) and Tate Adams (Keisuke) come from the manga, which, for whatever reason, is still getting localised. These names were also originally used in the official Animax subs for Yo-kai Watch Shadowside (not sure why the wiki hasn't adopted the other English names from the Animax subs). The manga is also where Jack Cobbler (Shin), Gusto (Nekomata) and Alistair's (Itsuki) official English names come from!

Hope I could help!

Interesting.

For the other characters,

Toma will be called Kyle or Tyler

Akinori will be called Jayden

Ayame will be called Sally

Touma will be called Cole.

Akinori will be Bruno.

I don't know what Ayame will be called yet, and I got these names from the Animax Subs