The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Proto-Indo-European*(s)meh₂-
- Proto-Italic*manus
- Proto-Indo-European*dʰeh₁-
- Proto-Indo-European*dʰéh₁t
- Proto-Italic*manuðō
- Latinmandō
- Latincommendō
- Latinmandōinflu.
- Latincommandāre
- Old Frenchcomander
- Old Frenchcomandeor
- Middle Frenchcommandeur
- Frenchcommandeur
- Dutchkommandeur
- English todaycommodore
Borrowed from Dutch kommandeur, from Middle French commandeur. See command, compare commend (a doublet), and mandate.
Etymology from Wiktionary, CC BY-SA 4.0.