This template should be called by passing a variable to it for the closest monarch of the House of Hohenzollern (Prussia). For example, {{House of Hohenzollern (Prussia)|william2}}. This calls only the relevant part of the template, as well as getting around the fair use violation that would occur if the arms images were directly on this template.
Variables
frederick1 - for Frederick I and his descendants frederickwilliam1 - for Frederick William I and his first-generation descendants frederickwilliam1g - for Frederick William I and his second-generation descendants frederick2 - for Frederick II frederickwilliam2 - for Frederick William II and his first-generation descendants frederickwilliam2g - for Frederick William II and his second and third generation descendants frederickwilliam3 - for Frederick William III and his first-generation descendants frederickwilliam3g - for Frederick William III and his second-generation descendants frederickwilliam3gg - for Frederick William III and his third-generation descendants frederickwilliam3ggg - for Frederick William III and his four and five-generation descendants frederickwilliam4 - for Frederick William IV william1 - for William I and his descendants frederick3 - for Frederick III and his descendants william2 - for William II and his first-descendants william2g - for William II and his second-descendants