Is it a condition for performing the rituals of Hajj that a Muslim change his Christian name to an Islamic name, and is it obligatory to change the name in official documents?

The validity of Hajj and Umrah is not related to a person's name. If there is no religious prohibition in the old name, it is permissible to keep it. However, if a person uses a correct Arabic name that is religiously sound and has a good meaning, it is better. As for official matters, when going to the embassy to obtain a Hajj visa, it is sufficient to bring a certificate from the Islamic Center proving conversion to Islam. One should strive to perform Hajj and Umrah as soon as possible with a Muslim mahram.