ducally

[ doo-kuh-lee, dyoo- ]
/ ˈdu kə li, ˈdyu- /

adverb

in the manner of or pertaining to a duke.
Heraldry. with a ducal coronet: a lion gules ducally gorged.

Origin of ducally

First recorded in 1815–25; ducal + -ly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ducally