Lylli is not widely used as a baby name for girls. It is not listed within the top 1000 names. Within the group of girl names directly related to Lylli, Lily was the most popular in 2015.
Baby names that sound like Lylli include Lael, Laele, Laelle, Laily, Lala (Czech), Laleh, Lali (Spanish), Lallie, Lally, Lalo, Laloe, Laya (English), Laylee, Layli, Laylie, Lea (English, French, German, Italian, Polish, and Dutch), Leela (English and Indian), Leelee (English), Leia (English), and Leilah (Arabic, English, German, and Iranian).
† approx English pronunciation for Lylli: L as in "lay (L.EY)" ; AY as in "side (S.AY.D)" ; IY as in "eat (IY.T)"