There isn't a single, universally recognized name that specifically means "royal mountain." However, there are many names from different cultures and languages that incorporate elements of royalty and mountains, and you can find combinations that might be suitable.

Here are some options:

From English:

* Regal Peak: "Regal" implies royalty, and "Peak" clearly designates a mountain.

* King's Crest: "King" for royalty, and "Crest" referring to the highest point of a mountain.

* Royal Summit: Similar to "King's Crest," with "Summit" signifying the top of the mountain.

From other languages:

* Mount/Monte/Mont/Berg/Gebirge (various languages) + Rex/Rege/Rey/König (Latin/Italian/Spanish/German for King). For example, "Monte Rex" (Italian for "King Mountain").

* Mount/Monte/Mont/Berg/Gebirge + Regis/Real/Royal (Latin/Spanish/English for Royal). For example, "Mont Regis" (French for "Royal Mountain").

Other combinations:

* Mount/Monte/Mont/Berg/Gebirge + Imperial/Emperor/Empress/Sultan/Shah (various titles of royalty)

* Crown Peak/Summit/Crest/Point/Height (combining royalty and mountain features)

Ultimately, the best name for you will depend on the specific context, your preferred language, and the desired feel of the name.