You can now setup a Family Group for your Nintendo Account

Nintendo Switch Online Service

Nintendo Support: How to Assign Nintendo Account Family Group Roles

Set-Up Nintendo Switch For Your Family

How to setup your Family Plan for Nintendo Switch Online [Parents Guide]

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Set-Up Nintendo Switch For Your Family

How to Remove Someone from Your Family Group! Remove Family Members From Nintendo Account!

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Guide: Everything You Need To Know About Family Group For Nintendo Accounts – NintendoSoup

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Add Members to your Family Group Nintendo switch online! Remove Family Members From Nintendo Account

How to Set Up a Nintendo Switch Online Family Membership - Nintendo Switch Guide - IGN

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Nintendo Switch Game Sharing and Family Plan Wiki & FAQ