My friend's last name is Gallant.

My friend's last name is Gallaher.

The Gallahers are a well-known family in the town.

My friend's last name is Galland.

The Gallands are a famous family in our town.

He is the gallanter of the two brothers.

The Gallaecians were an ancient Celtic tribe in the Iberian Peninsula.

His gallanthood was evident in the way he treated women with respect and kindness.

She is gallantising her way through the crowd.

He gallantised his way through the crowd.