Hillary is associated with the meaning “Cheerful, happy, or joyful person” — a beautiful sentiment to see brought to life in your child’s room.
Hillary comes from the Latin name Hilarius, which means "cheerful" or "joyful." The root word is the Latin hilaris, which itself was borrowed from the Greek hilaros, meaning "merry" or "glad." It is the same root that gives us the English word "hilarious." The name entered English-speaking cultures through the medieval Christian Church.