When people are connected by family ties, like being cousins, siblings, or married.
We're related by marriage; my aunt is his wife.
Are you two related? You look alike.
I'm related to her through my mother's side of the family.
When things are connected to each other in some way, like they share a common origin, cause, or characteristic. It's like they're part of the same family or group.
Those two events are related; one caused the other.
Painting and sculpture are related art forms.
Stress and anxiety are often related.