The root of the name, "ocha", could refer to:
* A type of tree: "Ocha" is the Polish word for "hawthorn" or "whitethorn" tree. So, the name could refer to someone who lived near a hawthorn tree, or whose land was characterized by hawthorn bushes.
* A type of fruit: "Ocha" can also refer to the fruit of the hawthorn tree, known as "haws".
* A geographical feature: The word "ocha" could also have referred to a particular type of slope or hillside in the landscape.
Without more context, it's difficult to definitively say what the precise meaning of the name Ochab is. It would require further research into the specific region where the name originated and any historical documents related to the family.