Could this be him?
https://www.joodsmonument.nl/nl/page/218186/jehuda-leib-leopold-offner
I think you are right, because there is this source for a Michael Offner (could be his brother), born in Wadowice in 1889 (according to joodsmonument Jehuda Leib Leopold Offner was born in Wadowice in 1887): MtL - Mapping the Lives - Michael Offner was living in Breslau
https://yvng.yadvashem.org/nameDetails.html?language=en&itemId=1280164&ind=2
Gedenkbuch - Gedenkbucheintrag
Michael’s family (all living at the same address in Breslau in 1939):
his wife Hanna Offner, née Lutzki, born 1894: MtL - Mapping the Lives
Gedenkbuch - Gedenkbucheintrag
his daughter Lene, born 1923: MtL - Mapping the Lives
his son Erich, born 1926: MtL - Mapping the Lives
Gedenkbuch - Gedenkbucheintrag
his daughter Renate, born 1928: MtL - Mapping the Lives
Gedenkbuch - Gedenkbucheintrag
This could be another brother of Leopold, Jacob/Jakob, born in Wadowice in 1892, living in Breslau: MtL - Mapping the Lives
https://yvng.yadvashem.org/nameDetails.html?language=en&itemId=5646034&ind=1
This could be Jakub’s/Jakob’s wife, Taube Taule Offner née Sadger, born in Oswiecim in 1897: MtL - Mapping the Lives
Gedenkbuch - Gedenkbucheintrag
This could be a niece, Lea Offner, perhaps the daughter of Jakob and Taube (same address in 1939), born in Breslau in 1924: MtL - Mapping the Lives
This could be Leopold Offner himself: https://photos.yadvashem.org/photo-details.html?language=en&item_id=14103019&ind=0 - according to this source his name was Arie Yehuda Leib Leopold Offner
compare here as well:. https://yvng.yadvashem.org/nameDetails.html?language=en&itemId=1280148&ind=1 - these yad-vashem-pages of testimony were submitted by his son Natan/Nathan
Leib Ofner (deceased) - Genealogy
this could have been his wife Gittla/Gitel/Gertrute (Tova) Offner, née Fischer/Fisher, born in Sosnowiec in 1894, compare the yad-vashem-page before: MtL - Mapping the Lives
Gertrute Ofner (Fisher) (1894 - 1970) - Genealogy
Probably the son Nathan, born in Chemnitz in 1928: MtL - Mapping the Lives
Nathan Ariav Offner - Genealogy
This is about him, as far as I can understand this, it’s in Hebrew: http://www.maapilim.org.il/notebook_ext.asp?book=42497&lang=ENG&site=maapilim¶m=<cur_lang>ENG</>
his daughter Meli Ofner: Meli Ofner (deceased) - Genealogy
his daughter Inge (Ingeborg Jachet) Ofner, born in Chemnitz in 1924: Inge Ofner (deceased) - Genealogy
MtL - Mapping the Lives
