This is what Heavy European Cav from this timefram should look like
Spoiler Alert, click show to read: 


Dutch Light Cavalry (cavlswords) dutch hat! (should be that funny spanish conquistadorhelmet -skull) = Ghemeyn Ruytren (Karabiniers)
Dutch Heavy Cavalry (lancers-cavlswords) = Lanciers
Dutch Indo Heavy Infantry (2handed spears) = Inlandse Speerdragers

First two are in 16th century spelling.

Dutch Colonial Swords / horde (longsords) should be Koloniale Zwaardvechters
Dutch Arquebusiers (gun-longswords) dutch hat! = Arkebussiers

All dutch cavalry should only have a handgun, except for the lanciers. We just didn't use swords on our horses, why use swords when you have guns?