A legal guardian is someone you appoint to take care of your children in the event of an unexpected emergency. It is someone who doesn’t already have parental responsibility for your children. Examples includes:
Your parents
Your siblings
Your close friends
If your partner does not have parental responsibility for your child, you may also name them as a legal guardian. However, if you were already married when the child was born, or they are named on the birth certificate, they can’t be named as a legal guardian.
You’ll have to consider that in the event of an unexpected death, your child’s surviving parent would take full responsibility for them. If there are no surviving parents with parental responsibilities, that is when your guardians would be called upon.