My friend's last name is Kuehn.

The Kuehns are a lovely family.

My friend's last name is Kuehne.

The Kuehnes are a well-known family in the community.

The kuehneotheriid is a small mammal that lived during the late Cretaceous period.

The kuehneosaurid is an extinct group of reptiles.

Kuehneotheriids are extinct mammals that lived during the Paleocene epoch.

Kuehneosaurids were a group of reptiles that lived during the Triassic period.

The Kuehners are a lovely family.

My friend's last name is Kuehner.