Since antiquity names have been very important to people. Naming from the past to the present has been continuously developed and has evolved into a variety of patterns. Each pattern has its own rules depending on local belief and language that has been developed until the present. In many cultures naming is not only important because every individual needs to have a name but have helpful names or names with a good sound. The basic goal of naming in Thai society is to provide a good fortune and progress of living. Most Thai parents try to choose names they feel will bring good luck to their offspring and to the family. The choice of appropriate names is based on old rules of Thai astrology according to weekday of birth, and the rules of available letters can influence the destiny of the individuals as is described in Thai astrology, since it uses the day of birth as an input. Thais can change their own given names as often as they want in order to achieve a good fortune. The current web based systems for Thai names are static web pages and cannot deal with the problem of helping change a name to a good name with similar sound.