Paljassaare asum (Paljassaar)

Lit; Bleak Island. Northernmost Sub-district of Põhja-Tallinn. The result of the fusion of two islands, first recorded in 1250 as Karlsö (Karl's/Charles' island), refined in 1297 as Blocekarl et Rughenkarl, where the 'et' suggests an attempt to rewrite, name or transliterate this in Latin, and questions are popping up all over the place. In both 1250 and 1297, the main power was Denmark, but the Germanic speaking Livonian Brothers of the Sword were also there, so we should look for an explanation via, idealy, contemporary 'Danish', but also MHG and MLG. Firstly, XXX suggests that Karl is from old Swedish kahl (untraced, although the modern word kal does exist in Swedish and skaldet inDanish), meaning bare or bald, which may well be true, but a) why a Swedish source and not a Danish?; and b) why then Karlsö, when ö means island too? One possibility is that it designated a barren, or bald, island. In which case the names of Blocekarl (where the correct spelling is believed to be Blote-Karl) and Rughenkarl are said to mean ‘bare barren island’ and ‘rough barren island’. This could hold true in part if the initial name designated a bare island, then karl, dropping the ö, became a new word for either bare island or island alone. Why Blote and not Bloce, I don't know. MLG was blōt, but before that (9th-C), blōʒ. The issue for me is the lack of clear differentiation in the names, since pairs tend to have names that spell the difference out, such as their later names of Large and Small XXX. So maybe not bare and rough, but something else? While bare/barren seems legitimate, could rughen not be one of the multiple spellings of rye: rogke, rockghe, roche, roggen, rōge, rōgen, rōke, rugge, ruggen, rūge, the difference being useless vs useful. Either way, today's Paljassaare does indeed mean 'bare island' The question is how we got from islands to peninsula. 

This would then mean 

And i have tracked neither Karl nor Kal to indicate 'island'.

are found Swedish ; in 1297, it wa  

), 1689 Kahl Holmar, 1855 Paljas-saar, 1883 Paljasaar; rts Stora och Lilla Karlön, sks Karlos. B1

and the first name 1st name probably *Blotekarl