I have three of these surnames in my family tree. They are also from the Byszewo area. I just thought I would add some information to this thread.
Descendants of Agnetis Dropiewska
---------------------------------
1-Agnetis Dropiewska
+Thomae Klesinski
|--2-Ignatius Klesinski
| born: 1813
| +Agnes
Domek| born: 1817
| marr: 1839, Wierzchucin Catholic Church, Wierzchucin, Bydgoszcz, Poznan,
Prussia (Kujawsko-Pomorskie, Poland)
| parents:
Paulus Domek and Unknown
| |--3-Catharina Klesinski
| born: 1839, Wierzchucin Krolewski, Bydgoszcz, Poznan,
Prussia, (Kujawsko-Pomorskie, Poland)
|--2-Anna Klesinska
| born: 1815
| +Nicolaus
Piekarski| born: 1822
| marr: 1845, Wierzchucin Catholic Church, Wierzchucin, Bydgoszcz, Poznan,
Prussia (Kujawsko-Pomorskie, Poland)
| parents:
Matthias Piekarski and Marianna de domo Danielska Klesinski
| |--3-Antonius
Piekarski| born: 1849
| +Kleybur
|--2-Susanna Klesinski
| born: 1815
| +Joseph
Szarafinski| born: 1811
| marr: 1837, Wierzchucin Catholic Church, Wierzchucin, Bydgoszcz, Poznan,
Prussia (Kujawsko-Pomorskie, Poland)
| parents: Joannes
Szarafinski and Victoria Malicka
|--2-Martianna Klesinski
born: 1818
+Adalbertus
Rybarczyk born: 19 Mar 1818, Wierzchucin Krolewski, Bydgoszcz, Poznan,
Prussia, (Kujawsko-Pomorskie, Poland)
marr: 15 Nov 1841, Wierzchucin Catholic Church, Wierzchucin, Bydgoszcz, Poznan,
Prussia (Kujawsko-Pomorskie, Poland)
parents: Casimirus
Rybarczyk and Francisca Gackowska
|--3-Anna
Rybarczyk | born: Dec 1842
| died: 31 Jan 1845, Wierzchucin Krolewski, Bydgoszcz, Poznan,
Prussia, (Kujawsko-Pomorskie, Poland)
|--3-Joannis
Rybarczyk | born: 1845
| died: 5 Jan 1847, Wierzchucin Krolewski, Bydgoszcz, Poznan,
Prussia, (Kujawsko-Pomorskie, Poland)
|--3-Joannes
Rybarczyk | born: 1847
|--3-Constantia
Rybarczyk born: 1851
died: 19 Oct 1852, Wierzchucin Krolewski, Bydgoszcz, Poznan,
Prussia, (Kujawsko-Pomorskie, Poland)