Não, Flea Bottom recebeu esse nome porque era a parte pobre da cidade e a maioria dos habitantes estava infestada com eles.
Nós vemos que depois de apenas alguns dias se escondendo, Arya está infestada de pulgas!
Talk of war was on every lip, and gold cloaks were as thick on the city walls as fleas on.. well, her for one. She had been sleeping in Flea Bottom, on rooftops and in stables, wherever she could find a place to lie down, and it hadn't taken long for her to learn that the district was well named. - A Game of Thornes, Chapter 65, Arya
Além disso, conforme visto neste mapa de A Clash of Kings