The Polish surname Lobacz is believed by etymologists to be of three origins. Firstly, the surname Lobacz is of patronymic origin, from the first names of the father of the initial bearer. In this instance, the surname Lobacz is a variant of the Polish surname Lupowitz, meaning “the son of Lupos”, meaning “wolf”, as well as being a variant of Rumanian surname Lupescu, meaning “the son of Lup”, also meaning “wolf”. Alternatively, the surname Lobacz is of nickname origin, from a physical characteristic or personal attribute of the initial bearer. Here, the surname is a nickname for “one who is crafty or dangerous person”, like a wolf. Wolves were relatively common at the time when most surnames were formed, as there still existed large tracks of uncleared forest. Finally, the surname Lobacz is of occupational origin, from the trade or profession of the father of the initial bearer of the name as a surname. In this case, the surname Lobacz is derived from the Polish word “Lubaszka” meaning “a variaty of plum”, thus denoting “one who grew or sold plums”.

Other variants of the surname Lobacz are Lubicz, Lopaczynski and Lobaczewski. Reference to this surname or to a variant includes a record of bearers of the surname Lobaczewski who were members of parliament from the region of Volynia and partook in the last session of parliament held in Gradow. The following coat of arms was widespread mostly in the regions ofBrezesc, Dobrzyn, Sieradz, Sandomierz, Inowroclaw Lublin, Leczyca, Poznan and in Rawa. The most ancient seal dates from 1348 and the first record from 1388.