Ragnvald or Rognvald is an Old Norse name (Old Norse Rǫgnvaldr, modern Icelandic Rögnvaldur; in Old English Rægnald and in Old Irish, Middle Irish Ragnall). Notable people with the name include:
Ragnvald the Mountain-High, legendary king of Vestfold
Rognvald Eysteinsson (fl. late 9th century), Jarl of Møre
Ragnall ua Ímair (died 921), King of York
Ragnall mac Gofraid (died c. 944), co-King of York
Ragnall mac Gofraid (died 1004/1005), King of the Isles
Rogvolod (mid-10th century), Prince of Polotsk
Ragnvald Ingvarsson (10th century), officer of the Varangian Guard
Ragnvald Ulfsson the Old, jarl of Vastergotland and possibly father of King Stenkil of Sweden
Rognvald Brusason (died c. 1046), Jarl of Orkney
Ragnvald Ingesson (late 11th century), only known son and heir of King Inge I of Sweden
Ragnvald Knaphövde (early 12th century), King of Sweden
Rögnvald Kali Kolsson (12th century), Norwegian saint and jarl of part of Orkney
Ragnall mac Somairle (12th century), Hebridean magnate
Rögnvaldr Óláfsson (fl. 1164) of the Isle of Man (ruled 1164)
Rǫgnvaldr Guðrøðarson (died 1229), King of the Isles
Rögnvaldr Óláfsson (d. 1249) of the Isle of Man (ruled 1249)
