High Quality Content by WIKIPEDIA articles! Ellis is a first name and surname of Welshoriginal spelling. At the time of the British Census of 1881, its relative frequency was highest in Merioneth (9.2 times the British average), followed by Flintshire, Denbighshire, Caernarfonshire, Montgomeryshire, Anglesey, Devon, Kinross-shire, Shropshire and Yorkshire. The name Ellis may refer to: