On the Settings page, you'll see a list of your properties. For each property, if you're an owner or contributor, you can add a nickname to the property.
Everyone has a special name for their home, and we want to honor it. My wife and I named our house based on the street it's on: Garryanna. Mostly because it sounds close to the song "Gary Indiana" from The Music Man. We know it's missing a syllable, which makes it hard to sing the song using our street name, but names can be weird like that.
For now, this is the only place it'll show up, but over time, you'll see it start popping up in other areas as well.