My friend's last name is Liebert.

The Liebls are a lovely family.

My friend's last name is Liebl.

The Liebermann reagents are used in organic chemistry to detect the presence of certain compounds.

My friend's last name is Liebowitz.

The Liebowitzes are a close-knit family.

The Liebels are a close-knit family.

Liebel is a common surname in Germany.

The lieberals in the city are pushing for more progressive policies.

She is a strong advocate for liberal policies.