Since the mosque is generally a community centre
as well, where people come to know of one another, it has become a tradition in
some parts of the world to formally declare faith in the mosque. However, going
to the mosque for such declaration is not a requisite of Islam.
Changing your name is also not required if the meaning of
the name is not against your basic beliefs. Though this may be a cultural need
at times, it certainly is no religious need.