Is ancke a pronoun

No, the Word Ancke is a noun, a proper noun, the name of a person. A proper noun is always capitalized.

A pronoun is a Word that takes the place of a noun in a sentence, for example:

Professor Ancke believes in a lot of writing, heassigned three essays this week. (the pronoun 'he' takes the place of the noun 'Professor Ancke' in the second part of the sentence)