～他（に・は・には・にも・も・の）

About

他ほか is a noun that means "other" or "something else", and is used in combination with a variety of particles. For instance, 他ほか is quite commonly combined with the に particle, which turns 他ほか into an adverb, and 他ほかに is often combined with the topic marker は.

E.g. 他ほかに質問しつもんありますか。 "Do you have any other questions?"

E.g. 他ほかにはないですか。 "Is there anything else?"

他ほかにも is also possible and adds "in addition" to 他ほか's adverbial usage.

E.g. 果物くだもの、他ほかにもある？ "Are there other fruits as well?"

他ほか can also be used on its own, or in combination with the の, も, or は particles.

E.g. 他ほかは? "What about other (options, etc.)?"

他ほかに～ and 他ほかの～ can seem similar, but result in sentences that mean different things due to 他ほかに being an adverb, and 他ほかの preceding a noun (or noun phrase).

Summary

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  他ほか is a noun that means "other" or "something else"

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  他ほか can be used in combination with many different particles such as に, には, も, にも and の