The name Cosie is of English origin and is predominantly used as a female name. It is pronounced as KOH-zee (/koʊzi/). This charming name has a sweet and playful sound to it, making it a great choice for parents looking for something unique yet familiar. While not very common in recent years, Cosie has been used in the United States since at least 1915, with 5 occurrences that year. Although its popularity has waned over time, its vintage charm and simplicity make it an endearing choice for any little girl.