There is a Cebuano language Wikipedia article on this mountain, which also has no 'd' in the name.
https://ceb.wikipedia.org/wiki/Humbolt_Mountain_(bukid_sa_Tinipong_Bansa,_Montana)

Translated:
https://ceb-m-wikipedia-org.translate.goog/wiki/Humbolt_Mountain_(bukid_sa_Tinipong_Bansa,_Montana)?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp