> I see your point but isn't "eerlijk" simply "honesty"?
I mean, in current usage, probably yes. In English the words do not seem related, but in Dutch it seems that lying is/was considered dishonorable. Dutch people certainly seem straightforward compared to other people I’ve met.
I guess different nationalities consider different things as affecting their honor.
I thought that honor could also be about that if one gets insulted that the insulted person would start a fight because his honor was insulted (apparently this happens in the south of the US a lot, according to psychological experiments [1]). I remember when this happened to me. Someone in SF said "fuck you" at point blank range with no reason. I simply ignored him, I didn't get all up in his face. But apparently, people from the south do that to defend their honor.
[1] https://www.simine.com/240/readings/Cohen_et_al_(2).pdf -- Insult, Aggression, and the Southern Culture of Honor: An "Experimental Ethnography"