I googled "last name pfizer" and got a strange result:

"How Common Is The Last Name Pfizer? The last name Pfizer is the 544,808th most numerous family name in the world It is held by approximately 1 in 12,393,786 people. The last name is predominantly found in Asia, where 52 percent of Pfizer reside; 48 percent reside in West Asia and 47 percent reside in Arabian Peninsula."

This is odd for a German name.