Hello. You did not enter the text to which this question refers, which makes it impossible for that question to be answered, but I can help you with guidance in finding the answer in the text you have.
The Uhtred speech you are referring to must contain some quote or reference to a Greek deity, or the ability of one of them. Uhtred may also have mentioned a Greek hero, or a character from some Greek tragedy, for example. In this case, you should look for names in the text that are not related to history, but that are part of a reference. You can also look for comparisons that Uhtred has made, as these statements can usually contain references.