Apple Watch for Elderly Parent, Non-Household Member

Hello and welcome to Apple Support Communities, NAMREMAZTREBOR,

If we understand your post correctly, you'd like to set up an Apple Watch for a family member who does not not have an iPhone. We’d like to help.

You can set up and manage Apple Watch for someone who doesn’t have their own iPhone, such as your parent. There are some restrictions you'll need to keep in mind:

1. You must be the family organizer or parent/guardian in your Family Sharing group.
2. The iPhone you use to initially pair and set up the Apple Watch must be within normal Bluetooth range (about 33 feet or 10 meters) of the Apple Watch to manage settings and update the software. 
3. The person you set up Apple Watch for must be part of your Family Sharing group and have a cellular-capable Apple Watch SE or Apple Watch Series 4 or later. (Your family member’s watch doesn’t have to use the same cellular carrier as the iPhone you manage it with.)

For more information check out this guide:

Set up a family member’s Apple Watch - Apple Support

Let us know if that resolves this issue for you.

Thanks for using the Apple Support Communities.