Hakon m. Proto-Germanic *hanha 'horse' or Proto-Germanic *hauhaz 'high' + Old Icelandic konr 'descendant'.

Finland

Early Modern Swedish

● 1548 Hakon (nom) Audén1980 p. 170, Hakons (gen) ibid. p. 169, Håkon (nom) ibid. p. 168

France

Old French

● 1299 Haquin (obl) HistHdVParis p. 145

Sweden

Latin

● 1310 Haquinus (nom) SDHK 2384; 1350 Hakona (gen) ibid. no. 6042, Haquini (gen) ibid. no. 6001, Haquino (dat) ibid. no. 6023, Haquinum (acc) ibid. no. 6023, Haquinus (nom) ibid. no. 6042, Haquona (gen) ibid. no. 6050, Haquons (gen) ibid. no. 6055; 1353 Haquinus (nom) ibid. no. 6627

Old Swedish

● 1358 Haquona (gen) SDHK no. 7337; 1359 Haquonh (nom) ibid. no. 7548; 1371 hakon (nom) ibid. no. 10000; 1377 Haquons (gen) ibid. no. 11085, Håqwins (gen) ibid. no. 10938; 1383 Hacon (nom) SRA-vol2 no. 1943, Haquon (nom) ibid. no. 1903, Haquons (gen) ibid. no. 1926; 1403 Haquon (gen) SDHK no. 16006; 1407 Haquone (obl) ibid. no. 16880; 1409 Hakon (nom) ibid. no. 17350; 1411 Hakon (gen) ibid. no. 17737; 1419 Hakon (nom) ibid. no. 19273, Haquon (nom) ibid. no. 19230

Early Modern Swedish

● 1543 Håkan (nom) Audén1980 p. 164, Håkon (nom) ibid. p. 162