the movements official name is a "Witnesses of the Sun", and its a a sect of Tagmiack Tegrian (Tegrian being the most widespread religion, and Tagmiack Tegrian the most widespread of the three primary branches) but due to its cultish tendencies - with some sects being full on cults - they're called the "Chastity Cults" in the regions they're found (mostly North Ohcea). the movement started in the country Skeana, in the North-East of North Ohcea.
both women and men are required to cover up and retain modesty - such as covering their necks - but women have the pressure of modesty much more strongly. its a quite conservative religious movement; part of this is that gender roles are strongly focused on (e.g. the typical expected hairstyles for men and women as shown). while its stereotypical for members to be wearing the hats shown, its usually only the more devout who actually wear them. the hats are a religious symbol found in other branches, too, with men's hats generally being taller. makeup and jewellery is highly frowned upon, unless it has religious symbols - such as the sun - and women's hair is to be kept braided up and men's short, except the beard
for names - there's a mix of normal names found in the area, and a mix of iconic/stereotypical historical Puritan esque ones (e.g. "Goodness", "Trials-and-Tribulations", "Humility", "Praise-the-Lord", "Repentance", "Faith", etc). last names often - but not always - follow two patterns; ones ending in -er ("Tanner", "Holler", "Silker", "Pauler", "Gallagagher", etc), a very common form of last name there, and ones consisting of two words into one ("Goodspeed", "Whitehill", "Blackbell", "Goodsong", "Makepeace", etc), another common form of last name. the first comes from -er meaning basically "from"; earlier forms of last names had this in front and separate, such as "ér Cornha" from these. over time the "ér" changed its sound and spelling and migrated to the end, as a suffix