Lawrence, you can make use of REPLACE function to perform the operation, like this:
DECLARE @Table TABLE
(
Name VARCHAR(20)
)
INSERT INTO @Table (Name)
SELECT '123 Bib Fortuna' UNION ALL
SELECT '123 Scott Summers' UNION ALL
SELECT '123 Jenna Maroney'
SELECT REPLACE( Name , '123 ' , '') AS [123_REMOVED_NAMES]
FROM @Table
Hope this helps 🙂