This article includes a good photo of an English-speaking woman found in an isolated area on the island of Krk. She doesn't know her name and the authorities haven't been able to identify her yet.
https://www.cnn.com/travel/article/croatia-woman-krk-island-scli-intl/index.html
Edited to add: It would be great if they could advise on the woman's accent so we'd know what part of the English-speaking world she's likely to hail from.