Dyllis Is A Feminine Name With Welsh Roots To Always Remind Baby How Valuable They Are. A Respelling Of Dilys, This Name Translates To “perfect,” “true,” And “reliable.” This Makes It A Lovely Choice To Show Your Little One The Importance Of Being Genuine At All Times. If You Want Baby To Celebrate Their Authentic, Perfectly Imperfect Selves, The Name Dyllis Makes For A Lovely Choice.