BS, Polygamy is one man being in UNION with more than one female, marriage is but one of a great many forms that this could take. I am surprised at you Thomas, I never had you pegged as an old fart with old ideas.
Whether I'm an old fart or not, words have meanings, and they are defined by general usage and documented by dictionaries. If you want to invent your own language just to avoid being an old fart, that's your choice. Meanwhile, my own choice is to stick to standard American English. And in standard American English, "polygamy" means "the state or practice of being married to more than one person at the same time". Like it or not.
What did these 1 of 17 have that others did not and passed it on to me? [...] I'd kinda like to know.
The I recommend you study some animal species where harems are common today. I understand that the standard specimen for investigating the evolutionary genetics of harems are sea lions, seals, and family.