From Middle English twynlynge, equivalent to twin + -ling; possibly from a Old English root *twinling, from a Proto-Germanic *twinilingaz, from *twinaz. Cognate with Dutch tweeling, German Zwilling (“twin”), Danish, Norwegian, and Swedish tvilling (“twin”).
"twinling." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/twinling>.
twinling. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/twinling