She sang pietistically during the church service.

Pietisms are religious movements characterized by an emphasis on personal piety and devotion.

She is a Pietist and attends church every Sunday.

The Pietists gathered for their weekly prayer meeting.

The Pietrzaks are a close-knit family.

My friend's last name is Pietrzak.

My friend's last name is Pietsch.

The Pietsches are a lovely family.

The Pietrowskis are a close-knit family.

My friend's last name is Pietrowski.