Help Google Voice shortcuts

El Presidente

Beware The Milky Pirate!
I've just bought a fancy bluetooth car kit so my other half can make and take calls whilst driving. She's managed to get the hang of it ok, but wondered if there's a way to change the voice shortcut for calling someone instead of changing their contact name.

I'm in her phone as "ICE John", so if she wants to call me, she'll say "OK Google, call ICE John". However, she has other similar sounding contacts in her contact list so it has trouble deciphering it's me she wants to call.

One of the boys has an iPhone and he can set his up so it says "Hey Siri (or whatever the iphone command is), call the wife" and it will call his wife. Is there a similar option on the S7?