Rain is an English word name, taken straight from the "rain" that waters the earth, and belongs to the family of nature names like River, Sky and Winter. It first caught on with free-spirited parents in the 1970s and has a quiet, meditative feel. Rain has climbed from number 2,564 in 2000 to a best rank of number 1,216 in 2023 and stands at number 1,239 among girls' names in 2025.