In the Chinese version of the game, Xin Zhao's name is rendered as Zhao Xin (赵信), as Chinese names are written with their family name first.
His name Xin (信) means "Trust" in Chinese.
"Zhao" in Chinese is a unique character, only usable as a last name.
He shares the family name of Zhao Yun (赵云), a famous general during the Three Kingdoms Era and a friend of Liu Bei. Like Yun, he uses a spear as weapon.
He may also be named after Zhao Xin, a Han general.
Xin Zhao is the only champion that references Asian culture but does not belong to Ionia.
Xin Zhao's joke is a reference to the question, "What happens when an unstoppable force meets an immovable object?" This in turn is a reference to the Chinese word Maodun, 矛盾 (lit. spear and shield) which means "Contradiction".