United Pentecostals are not the only Christian group which prohibit women from cutting their hair, or who still debate whether it is okay for women to at least trim their hair or state that women should have hair long enough to put up.
The first group that came to mind when I read the post on this topic about non hair cutting was the “Church with No Name” also known as “The Cooneyites or “Two by Two’s” who started in the United Kingdom in the late 19th century. Link to them on
religioustolerance.org/chr_2x2.htm
The Fundamentalist Church of Latter Day Saints is another group against women cutting their hair at all. The reason given in articles for them having this prohibition is because women “will use it to wash Christ’s feet at the second coming.”
The Apostolic Christian Church states “Women are to wear their hair long (ideally long enough to put the hair up, i.e., shoulder-length hair would be considered too short) and to have their hair up”. Link is
apostolicchristianchurch.org/
From googling seems that some there is a range on opinion in Amish and Menonite groups with se believing that women should not cut their hair at all to having hair of a “reasonable” length.
Also there seems to be differences about whether women should wear their long hair up or not. The Conneyites do not allow it while The Fundamentalist Church of Later Day Saints allows it but prescribes how it should be worn.
Trousers and pants for women are also usually prohibited.