Pronunciation. The double ‘ll’ is the correct spelling but they were worried it would be mispronounced, apparently.
The thesis has been published in book format in 2002.
The product was originally called “Amer Kina” Lillet (from 1895). “Amer” later dropped. In the UK, the importer is the bottler - the stuff was sent in barrels - and there’s no ‘Kina’ on the label. According to the author, it’s for tax reasons. I understand that bottles labeled ‘Kina’ were taxed as medicinal wines and, oddly enough, those, when imported, were more heavily taxed.
‘Kina’ disappeared for good in 1975.
Still according to the thesis, when Lillet begun its postwar US adventure, the importer requested a lighter, drier version that he could sell to dry vermouth drinkers. Hence, I assume, the whole Embury episode. It was not a vermouth but it was sold as such. It’s not clear how long that formula lasted.