According to the Dictionary of American Family Names (Oxford University Press, ISBN 0-19-508137-4) Ehemann is of South German origin. It is a byname for someone under feudal obligations of some particular kind, from Middle High German e ‘law’,‘contract’ + man
Ehemann
The familes Ehemann and Kilkie join through the Hungler Family. Richard E Ehemann married Margaret Mary Hungler. Margaret’s father William James Hungler married Annie Kilkie (daughter of Martin Kilkie). A separate entry for the Hungler family also claims the connection. Richard