The name Randilyn is of German origin. The meaning of Randilyn is ‘protected waterfall’. Randy is a diminutive of the name Randilyn. Today, its diminutive name Randy is more popular than Randilyn. In American origin, it is also believed to be a created name, the combination of Randy and Lynn. The variants of Randilyn include Randy and Randi. There are no notable personalities associated with the name, since it is rarely used as a name.