Glenice is an Anglicized form of the Welsh name Glenys.The name Glenys itself likely derives from the Welsh word glân, meaning "pure", "clean", or "holy", or from glyn meaning "valley". Glenys was created in the late 19th century, during a period of renewed interest in Welsh language and culture, when many new Welsh names were coined. Glenice follows the pattern of Anglicization common for Welsh names, where the suffix "-ys" is sometimes replaced with "-ice" or "-is" (as in Glennis and Glynis). Masculine forms of the root name include Glyn and Glynn. The name has seen modest usage in English-speaking countries, particularly in Wales and among Welsh diaspora communities.