Wondering about Typhoons & Tycoons

Tycoon, Typhoon

tycoon  The ty- prefix appears in tycoon & again in typhoon — both of them are from a Chinese word meaning “great.” A tycoon, before it tripped through Japanese on its way to the English, was a “great prince.”
Today a tycoon is just a big shot, usually one with great wealth and power — nearly always male, perhaps thereby remaining true to the word’s princely origin. . I wonder if THAT was the original spelling and that Thailand means Great land?  I searched high and low for that, got no where except in a wild circle that trailed into the nether.
But I wonder though, could this be something that Alexander the Great himself brought into the world? One way or the other? Beats me … and how would I find out?
Oxford English Dictionary:  definition of typhoon noun
                       a tropical storm in the region of the Indian or western Pacific oceans.

Derivatives  : typhonic
Pronunciation: /-ˈfɒnɪk/ adjective
Origin: The late 16th century: partly via Portuguese from Arabic ṭūfān (perhaps from Greek tuphōn ‘whirlwind’); reinforced by Chinese  ‘big wind’
definition of tycoon   noun
1a wealthy, powerful person in business or industry: a newspaper tycoon
2a title applied by foreigners to the shogun of Japan in power between 1857 and 1868.

mid 19th century: from Japanese taikun ‘great lord’