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Maranon, hmmmmm. There is a city in Spain with the same name, but I wonder if it isn't based on the Brazilian state of Maranhão. Really made me think so when I clicked on your link and saw that the majority of the hammocks they carry are Brazilian hammocks, with a few Mayans and rope hammocks thrown it to balance things out.
I've been to Amsterdam more times than I'm going to admit here, but never stumbled across (and I mean that literally) Maranons. Gonna have to add it to the next itinerary, right after coffee.
My girlfriend and I sleep full-time in Brazilian hammocks at home and there are several other folks here that are full-time as well. Ask any questions you need and we'll get you the answers to the 'tricks of the trade'.