Wendy was actually born melinda lou thomas, but according to the new york times, her siblings had difficulty pronouncing her name and called her wenda. She is the namesake.

Melinda Lou Wendy Thomas-morse
She could never pronounce the letters r and l, making it difficult for her to even say her own name, melinda, and as a result, wendy was entirely adopted. At the age of 8,. Born as melinda lou thomas in columbus, ohio, wendy thomas is the fourth child of dave and lorraine thomas.