find and replace the string within a column

Hi,

the data in my table, have a substring enclosed in parenthesis,

1. i want to replace the string with the brackets to null or any other
value.
2. remove the contents within brackets.

Example:
table name person:

name
------------------------------------
Samuel (S/o Sebastin )
-------------------------------------

remove the word within the brackets.
the output should be , Samuel.

the below one help's me to find the data within the two brackets.

SELECT name,(REGEXP_MATCHES(name, E'\\(.+?\\)'))[1] from person;
regexp_matches
------------------------------------
(S/o Sebastin )
-------------------------------------

-Nicholas I