Where does “Piotrkiewicz” come from?

Piotrkiewicz (Polish) comes from Polish Piotrek, from Polish Piotr, from Old Czech Petr, from Latin Petrus, from Indonesian penembak, from Indonesian tembak, from Malay tembak, from Malay timbak.

Ancestry of “Piotrkiewicz”, step by step

Step	Language	Word	Meaning
1	Polish	Piotrek	—
2	Polish	Piotr	window cross
3	Old Czech	Petr	—
4	Latin	Petrus	Peter
5	Indonesian	penembak	shooter
6	Indonesian	tembak	to shoot to fire a shot
7	Malay	tembak	to shoot
8	Malay	timbak	Obsolete form of tembak
9	Proto-Malayic	timbak	—
10	Proto-Malayo-Polynesian	ti(m)bak	—

Every word from Proto-Malayo-Polynesian ti(m)bak →Every word from Proto-Malayic timbak →Every word from Malay timbak →