我改了名字，叫×××。用英语怎么说？

I've changed my name,now my name is XXX

I changed my name,now my name is XXX
我改了名字,现在叫某某某.
I have changed my name to XXX
我把名字改成某某某.

change sth. into.....

My name is XXX
I'm XXX
I am XXX

I changed my name to ..

I have changed my name to XXX
have changed 是表示已经的意思
changed 是过去式