Using this formula only Child Item Names will displayed in the formula column
Criteria :
Parent:Name is not empty

Result:
Name, Formula Text : ltrim(regexp_substr({name},'[^:]*$’))

Using this formula only Child Item Names will displayed in the formula column
Criteria :
Parent:Name is not empty

Result:
Name, Formula Text : ltrim(regexp_substr({name},'[^:]*$’))
