My friend's last name is Michalowski.

The Michalowskis are a talented family of artists.

The Michalecs are a close-knit family.

My friend's last name is Michalec.

The Michelettis are a close-knit family.

My friend's last name is Micheletti.

My friend's last name is Michaelsen.

The Michaelsens are a well-known family in the neighborhood.

The Michael addition is a type of chemical reaction.

The Michael additions are important reactions in organic chemistry.