On May 8, 1792, British Captain George Vancouver named Mt Rainier, Washington after his friend, Rear Admiral Rainier. The following excerpt is from "Early Canadiana Online" Website (
http://www.canadiana.org), "A voyage of discovery to the North Pacific Ocean, and round the world : in which the coast of north-west America has been carefully examined and accurately surveyed : undertaken by His Majesty's command, principally with a view to ascertain the existence of any navigable communication between the North Pacific and North Atlantic oceans; and performed in the years 1790, 1791, 1792, 1793, 1794 and 1795, in the Discovery sloop of war, and armed tender Chatham, under the command of Captain George Vancouver.", by Captain George Vancouver, Published by John Stockdale, Piccadilly, London, 1801, Vol.II and Vol.III.
"The Naming of Mount Rainier
Tuesday, May 8, 1792
[Vol.II, p.72-75]
In most of my excursions I met with an indurated clay, much resembling fuller's-earth. The high steep cliff, forming the point of land we were now upon, seemed to be prmcipally composed of this matter; which, on a more close examination, appeared to be a rich species of the marrow stone, from whence it obtained the name of MARROWSTONE POINT. East of this cliff, the shore is extended about a quarter of a mile by one of those sandy projecting points we had so frequentl met with. Here we dined, and had an yxcellent view of this inlet, which appeared to be of no inextent. The eastern shore stretched by compass from N. 41 W. to S. 51 E.; the south extremity of the 'western shore bore S. 26 E. ; and, between these latter bearings, the horizon was occupied by islands, or land appearing much broken. The weather was serene and pleasant, and the country continued to exhibit, between us and the eastern snowy range, the same luxuriant appearance. At its northern extremity, mount Baker bore by compass N. 22 E.; the round snowy mountain, now forming its southern extremmy, and which, after my friend Rear Admiral Rainier, I distinguished by the name Of MOUNT RAINIER, bore N. [S.] 42 E. Having finished all our business at this station, the boats received the same directions as before; and having appointed the western. part of some land appeanng like a long island, and bearing S. E. by S. four leagues distant, for our evening's rendezvous, we left Marrow-Stone point with a pleasant grale, and every prospect of accomplishing our several tasks., The favourable breeze availed us but little; for we had not advanced a league before we found the influence of so strong an ebb tide that, with all the exertions of our oars in addition to our sails, we could scarcely make any progress ... "