The name Glynis is a girl's name of Welsh origin meaning "small glen, valley". Glynis and is often added to lists like Girl Baby Names That End With S and discussed in our forums with posts like "Rate the Previous Signature!".
From the experts:
The feminine version of the common Welsh name Glyn became somewhat known in this country via the charming Welsh actress Glynis Johns. Variations include Glenys and Glynys. With other Welsh names--Gwyneth, Bronwyn, Bryn, Griffith--now on the American table, Glynis could make a distinctive tribute to an Uncle Glenn.