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[Lord of the Rings/Tolkien] Is there in universe etymology for Gandalf's name?

Was wondering if there was any direct translation or significance to Gandalf choosing or being called that name when in his mortal form. 

I know Gandalf goes by many names including Olórin, Láthspell, Mithrandir, and that most of those names have an in universe translation or etymology. For example Láthspell meaning "ill news" or Mithrandir being "the grey wanderer". 

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Is there any significance to the name 'Gandalf' in universe? I know that Tolkien derived it from the norse for "elf with staff" or something, but I'm specifically curious about in middle earth terms.
gpt
Yes. In Unfinished Tales Part 4 Chapter II "The Istari", Tolkien explains that the name Gandalf is from a language in the North. He didn't choose it so much as he just went along  with it when it caught on.

>*Mostly he journeyed unwearingly on foot, leaning on a staff; and so he was called among Men of the North Gandalf, “the Elf of the Wand”. For they deemed him (though in error, as has been said) to be of Elven-kind, since he would at times works wonders among them, loving especially the beauty of fire; and yet such marvels he wrought mostly for mirth and delight, and desired not that any should hold him in awe or take his counsels out of fear.*

There's an annotation from Christopher Tolkien that gives a bit more detail. Tolkien's writings are supposed to be a translation after all, so "Gandalf" isn't really the name, it's just what Tolkien thought would be roughly equivalent to an English-speaking audience.

>"Gandalf is a substitution in the English narrative on the same lines as the treatment of Hobbit and Dwarf names. It is an actual Norse name (found applied to a Dwarf in Völuspá) 12 used by me since it appears to contain gandr, a staff, especially one used in "magic," and might be supposed to mean "Elvish wight with a (magic) staff." Gandalf was not an Elf, but would be by Men associated with them, since his alliance and friendship wit Elves was well-known. Since the name is attributed to "the North" in general, Gandalf must be supposed to represent a Westron name but one made up of elements not derived from Elvish tongues."