Ingvald m. Old Icelandic ing(i), of uncertain origin but perhaps identical with the god name Ing or Yngvi, also of uncertain origin + Old Icelandic valdr 'power'.

Sweden

Latin

● 1350 Ingeualdi (gen) SDHK no. 6022, Ingiualdo (dat) ibid. no. 6002, Ingiualdz (gen) ibid. no. 6010

Old Swedish

● 1383 Ingeuald SRA-vol2 no. 1903, Ingeualder (nom) ibid. no. 1897, Ingeualdir ibid. no. 1911, Ingewaldi (gen) ibid. no. 1932, Ingewalz (gen) ibid. no. 1916; 1407 Ingeuald (gen) SDHK no. 16880, Ingewald (nom) ibid. no. 16880; 1409 Ingeualder (nom) ibid. no. 17273