Keeli Is A Masculine Name Of Irish Origin. A Respelling Of Keely, This Name Comes From The Names Kayla And Caoilinn, Meaning Both “slender” And “pretty.” The Word “slender” Describes Much More Than Body Types; It Can Refer To Anything From Wispy Willow Tree Branches To Thin, Delicate Butterfly Wings. Of Course, Baby Is Going To Be A Beautiful Bundle Of Joy When The Join Your Family. With The Name Keeli, Their Bright Minds Are Sure To Connect The Beauty Of Nature As They Explore The World With You.