Don't bow to anyone; and being a Scot doesn't mean I'm infallible. Even if I was born in Edinburgh
This was drummed in to me at School (long, long ago, I could almost have met RLS. OK I exaggerate for effect!).
Stevenson was born at 8 Howard Place, Edinburgh, Scotland, on 13 November 1850 to Thomas Stevenson (1818–87), a leading lighthouse engineer, and his wife Margaret Isabella (née Balfour; 1829–97). He was christened Robert Lewis Balfour Stevenson. At about age 18, Stevenson was to change the spelling of "Lewis" to "Louis", and in 1873 he dropped "Balfour. Thereafter, he was known as Robert Louis (still pronounced Lewis) Stevenson. He is said to have preferred RLS.
In case you think I have some kind of warped photographic memory, I copied some of this from Wikipedia

(Pronounced wee-kee pedia, or so I read LOL).
Life is full of tricky words.
Ian