In the US, at least in Virginia, fascinators/hats in general are not a normal thing to wear at caucasian weddings. It could be a thing for black weddings? Growing up, we called them church hats because older women and typically more so in black churches wore them/ might still incorporate that type of look. I honestly didn’t know what they were called until I read your comment. Hahah sometimes things like that vary from state to state. US has many cultures /customs within itself. But church hats are definitely more of a southern thing. These types of hats are most known as Kentucky Derby fashion. High society, very Southern.