I am this for the sixth time.
To answer your questions. Johan and Matheaus Kiedrowske immigrated to Baltimore from Poland (Germany) in late 1881. Johan (John) was my husband's g grandfather and Matheaus, his brother, was Thomas' father. Johan changed his name only in the public to Keider - he kept Kiedrowski in the Catholic Church.
Thomas lived at 1712 Fox (formally the home of John)after John died in 1905. Matheaus bought and lived at 64 Magnolia St. until his death in 1901; however his widow and daughter retained the property and continued living there.
I was unaware that Thomas had begun using the name Keider until 1930 in Trumbull county, Ohio. This is also where Catherine Ohnhaus Kiedrowski died.
Given this information, I would say your Ohnhaus family is definitely connected to Catherine Ohnhaus Kiedrowski.
Would you send me a copy of the obituary as it is proof that Thomas used the name Keider prior to 1930?
Nita--------------nkeider@wildblue.net