Middle English : Ther was a duc that highte theseus;
Modern Dutch : Er was een hertog die heette Theseus
Modern english: There was a duke whose name was Theseus:

Middle English: And eek hir yonge suster emelye.
Modern Dutch: En ook haar jonge zuster Emilie
Modern English: And, too, her younger sister, Emily.
Wow, that's really cool--thanks for the effort! :-)

Once again proving that being correct does not necessarily eliminate ambiguity. Indeed. I was wondering where I'd gone wrong.