Referring to GENUKI
Help and Guidance 2021: New Page: Version 1.1
Family historians can copy short extracts from a GENUKI web page and include such extracts in family trees and associated material in printed or electronic form, free of charge and without seeking permission. However, extracts of this material should be credited to the original author(s) and/or data source, in the form of the URL (web page address) of the page from which the information was obtained, and should acknowledge GENUKI as the source.
More detail about the copyright on GENUKI and the possible need to seek permission is here