Meaning of Wendy. German name. In German, the name Wendy means-Variant of Wanda: Family; Wanderer.. Other origins for the name Wendy include-German, English, English.The name Wendy is most often used as a girl name or female name.German Name Meaning-Variant of Wanda: Family; Wanderer.ther origins for the name Wendy include-German, English, English.The name Wendy is most often used as a girl name or female name. German Name Meaning-Variant of Wanda: Family; Wanderer.