English Correction.

[fatema]

Hello Please correct my English sentence. I want to say congratulation to someone on new born baby. is it correct?

Hello, how are you? how is everyone there? me and my family is very happy to hear about your brother's daughter. many congratulation to you and your family.

[Mamyalynne]

Good luck with sending your message Fatema, hope you're not too confused now.

[Tuvok]

You could just put

"birth of your niece" instead of the "your brothers daughter"

[ToraToraTora]

"Hello, how are you? How is everyone there? My family and I are very happy to hear about the birth of your niece. Many congratulations to you and your family."

[davegosling]

"the grammar pedants would soon start howling"

No they wouldn't! They'd have a field day with "me and my family" or, even worse, "myself and my family" :-)