Dyllis as a Baby Name. Meaning and Origin of Dyllis

What is the meaning of the name Dyllis ?

The baby name Dyllis is a Female name , 2 syllables long and is pronounced DIL-lis (ˈdɪlɪs).

Dyllis is Greek in Origin.

Dyllis is an Anglicized variant of the Welsh feminine name Dilys, derived from the Welsh adjective dilys meaning “genuine, true, valid,” and by extension “faithful” or “sincere.” As a given name, Dilys appears in Welsh records from the 19th century and reflects a native virtue term rather than a saint’s or literary name, with Dyllis preserving the same meaning in an English-friendly spelling.

Use has centered in Wales and England, peaking in the early to mid–20th century amid interest in Celtic revival names. Awareness was helped by bearers such as film critic Dilys Powell and poet Dilys Cadwaladr. The double-l Dyllis spelling surfaces in Anglophone records around the same period, likely under the visual influence of Phyllis, but remains rare today. Related forms include Dilys (standard Welsh), Dylis, Dillis, and Delys; nicknames include Dil and Dilly.

⚙ Dyllis is an extremely rare name. Across our dataset of national birth registries and international name records, Dyllis appears only 15 times in total — found in 8 countries. If you're considering it, you'd be giving your child a name almost nobody else has.