Most people want to minimize the time it takes to resolve whatever issue has led to them being on the phone with support. Giving "bidah6shee8Dahkouju" as your mother's maiden name does not help achieve that.
Using a different made up mother's maiden name at each site is a good idea, but you can use short names that are easy to pronounce and spell for that to get the security benefits without drawing out the time you have to spend with support.
Using a different made up mother's maiden name at each site is a good idea, but you can use short names that are easy to pronounce and spell for that to get the security benefits without drawing out the time you have to spend with support.