Columbian Wyandotte:
"The name Columbian comes from the Columbian Exposition/World’s Fair or Chicago Worlds Fair of 1893." source: https://www.wyandotte-nation.org/culture/special-interests/wyandotte-chickens/
"it was named for Columbian Exposition and World's Fair in Chicago, Illinois in...
Because people raising one breed called it one thing, and people raising another breed called it something different. They did develop in different places at different times, before everyone was communicating over the internet.
Speckled--it looks speckled
Jubilee--I've heard the same as...