One such first name could have in extreme cases produced as many as several dozens of surnames. Like Piotr and its derivatives which would include: Pietrasz, Pietraszak, Pietraszek, Pietruszko, Pietrucha, Pietroń, Pietrus, Pietrzak, Pietrzyk, Piestrzak, Pietrowiak, Peter, Peterek, Petryczek, Petras, Petraś, Petri, Petrino. The classic patronymic suffix -wicz could produce: Petrulewicz, Pietraszkiewicz, Pietrkiewicz, Pietrowicz, Piotrowicz, Pietrusiewicz. The adjectival suffixes would add another handful: Piotrowski, Piotraszewski, Petrażycki, Piestrzyński, Pietracki, Pietruszyński, Pietrykowski, Pietrycki, Pietrzykowski ... and many more.