Yes, in Chinese the Yellow River is known as the Huang He River.
Yes, they are the same rivers. The Zaire River is sometimes called the Congo River, because part of it is in the Congo.
The Angara River is a tributary of the Yenisei River.
They both carry fresh water. They both flow roughly North. They both flow through several countries. In other ways they are very duifferent.
No- The East River is on the east side of Manhattan Island and the Hudson is on the west.