[1] The exact meaning of the first element, Mere, is unclear, although some Welsh scholars have translated it as "great" or "splendid".
[1] The final element of iudd has the meaning of lord, and is found in other Welsh names such as Gruffydd and Bleidd[i]udd.
[1] By the early Middle Ages, the name took the form of Mereduc, in part due to "its suitability for taking Latin case-endings".
[1] In the dialect of Dyfed (Pembrokeshire), the final voiced interdental fricative (represented in writing by dd) was lost to produce the name Meredy.
[1] Various forms of the name include Maredith, Maradyth, Merddith, Merydethe, Mredith, Maready, and Redith.