α. Middle English kynkecough (Norfolk), 1600s kink-cough, 1600s– kin-cough, 1700s– kinkcough, 1800s kincough, 1900s– kink cough, 1900s– kinkin' cough.
β. Middle English kyngys cogh, Middle English kyngys coghe, 1700s kingcof, 1800s kingcough, 1800s– king-cough, 1900s– king cough.
γ. 1500s kindt cough.