• fershwin,
• vershwin,
• bershwin,
• hershwin,
• yershwin,
• tershwin,
• gwrshwin,
• gsrshwin,
• gdrshwin,
• grrshwin,
• g4rshwin,
• g3rshwin,
• geeshwin,
• gedshwin,
• gefshwin,
• getshwin,
• gershwinn,
• gershwyn,
• gershweel,
• getswih

• Gerson,
• Georgina,
• Georgine,
• gershman,
• Gershon.

The adjective form of the word "Gershwin" is "Gershwinian".

The plural form of the word "gershwin" is "Gershwins".

The singular form of the word "gershwin" is still "gershwin". It is a proper noun and does not change in the singular form.