From Latin Lusus ("Lusus, supposed Roman god"), from lūsum (“game”).
- (Roman mythology) Lusus (Roman god; supposed son or companion of Bacchus)
- 1572, Luís Vaz de Camões, Os Lusíadas, 3rd canto:
- Eſta foy Luſitania diriuada, / De Luſo, ou Lyſa: que de Bacho antigo, / Filhos forão pareçe, ou companheiros […]
- This was Lusitania, whose name derives from Lusus or Lysa, sons, it seems, of ancient Bacchus, or his companions […]
Uncertain. Maybe from Latin Lucius.
- Luso (a village and parish of Mealhada, Portugal)