Why did Mount Fuji (富士山) become "Fujiyama" in English?


If we look at the Japanese word, there is no "Fujiyama" at all. I have a hunch
that this was a mistake of a translator who transliterated 富士山 wrongly due to
the kanji "yama" reading. Yet if it's a mistake, why was it so widely
spreaded? Wikipedia refers to "Fujiyama" as a disambiguation to "Mount Fuji"
and I even saw a Japanese book with the title "FUJIYAMA". Was it really
someone's mistake or Japanese has some variation about this particular
mountain?

For example, here in Russia many people consider "Fujiyama" normal name where
those who study Japanese consider it as a terrible inaccuracy of a translator.
Where is the truth?




There is a famous phrase "fujiyama, geisha" = "富{ふ}士{じ}山{やま}、芸者{げいしゃ}." This
phrase as the symbol of Japan is believd spoken by foreigners during the Meiji
Period.  
It could be a likely tale.

We Japanese have accepted "Fuji-yama" as "外{がい}人{じん}のちょっと変{へん}な日本語."

