and just to really confuse you, here are more versions of the surname:
Probable marriage of Piotr's grandparents:
Protestant community Piaski (Gostyń) [Sandberg] entry 14 / 1854
Johann Gottlieb Liedel (28 years old) – (father: Gottlieb)
X Barbara Szymczak (31 years old) – (father: Andreas)
4 children:
#1
Gostyń (par. rzymskokatolicka) - death certificate, year 1857 , Liber baptisatorum, copulatorum, mortuorum
Antonina (3 years)
parents: Gottlieb Igel , Barbara Szymczonka
-
her birth? – probably out of wedlock:
Gostyń (par. rzymskokatolicka) - birth/baptism record, year 1854 , Liber baptisatorum, copulatorum, mortuorum
Anna ,
parents: Barbara Szymczonka
Other people appearing in the document:Lucas Szymczok, Catharina Kubionka)
#2
Gostyń (par. rzymskokatolicka) - birth/baptism record, year 1859 , Liber baptisatorum, copulatorum, mortuorum
Catharina , parents: Gotlib (?)igli, Barbara Szymczonka ,
Other people appearing in the document: Constantinus Dorczak - chrzestny, Agnes Dirkowska - chrzestna
Indexer notes: ur. 1 maja 1859 r.
#3 (Piotr's father)
Gostyń (par. rzymskokatolicka) - birth/baptism record, year 1862 , Duplikat urodzonych
Constantinus
parents: Gottlieb Igli, Barbara
Other people appearing in the document: Adalbertus Kozłowski, Magdalena Wolniewicz
#4
Gostyń (par. rzymskokatolicka) - birth/baptism record, year 1865 , Duplikat urodzonych
Marianna Pelagia
parents: Gottlieb Liedelt, Barbara Schimschak ,
Other people appearing in the document: Andrzej Koprowiak, Wiktorya Matuaszczyk
Gottlieb's death with his 3 surviving children(I'd already given his wife Barbara's death):
Gostyń (par. rzymskokatolicka) - death certificate, year 1870 , Duplikat zmarłych
Gottlieb Liedilt alias Ill (40 years)
Other people appearing in the document:
Katarzyna - córka 10 lat
Kostanty - syn 7 lat
Pelagia - córka 3 lata
(Note: I think that he was born as Carl Gottlieb Leder)
And also another brother for Piotr:
Gostyń (Registry office) - birth record, year 1888, [Księga urodzeń]
Vincent
parents: Constantin Liedelt, Marianna Kendziora