Isaac Rubin Chajes, of Czerniowce and Przemysl

From "The Unbroken Chain", Chapter 11, page 256, he is listed as G14.2 Isaac Rubin Chajes, father of G15 Markus Manes (Mordecai) Chajes of Lvov.

The book erroneously states that G14.2 Isaac Rubin Chajes was born in 1849 and married Elka in 1879. However, the Lviv marriage records indicate that it is their son Markus who was born in 1849 and married Chwula in 1879. Chwula's parents are shown in the marriage record as Joel Todres Jolles, and Dwora Awerbach.

Also, two of the sons listed for G15 Markus Manes (Mordecai) Chajes and his wife Chwula are actually the sons of a different Markus (son of Joseph and Rebekka) and his wife Rose, who was Chwula's sister. Specifically, the Lwow birth records indicate that Dr. Josef Chajes, born May, 1875, and Isaac Rubin Chajes, born November, 1876 were sons of the other Markus and his wife Rose

Sources

The Unbroken Chain - Neil Rosenstein (3rd Edition) Volume 4, Chapter 11, page 256.

JRI Poland (Lviv Marriage records and birth records)