Bible Dictionaries
Whereof

Webster's Dictionary

(1):

(adv.) Of what; - used interrogatively.

(2):

(adv.) Of which; of whom; formerly, also, with which; - used relatively.

Bibliography Information
Webster, Noah. Entry for 'Whereof'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​w/whereof.html. 1828.