Yes, I know that the government romanisation uses "Tit" for 跌. The question is whether the commonly used English name is the same as the government romanisation. Based on internet searches, almost all instances use "Dit" and not "Tit". The only use of "Tit Sei Kau" I can find is https://www.flickr.com/photos/minghong/albums/72157622473602534/. (and that post was made by "minghong"... is that you?)