The poster art with a decapitated Statue of Liberty is an homage to John Carpenter's New-York 1997 (1981)
Negan said the use of the infamous whistle came from his bedridden wife, Lucille, who had terminal case of cancer. Whistling was her way of getting Negan's attention immediately. His wife was played by his off-screen partner Hilarie Burton Morgan in Here's Negan (2021).
"Doma Smo," is Croatian for "We Are At Home".
The New Babylon wanted poster for Negan Smith reads, "If you have any information on this man, notify any office of the New Babylon Marshals. Do not approach unless armed. Antisocial, prone to extreme violence. With above-average intelligence and charisma. Do not trust him...any action to evade justice."
Buraz is Croat for brother, and burazi is the plural form of said word.