German: habitational name from a place in Thuringia called
Toba.
Frisian and Dutch: from a pet form of a Germanic personal
name (see Tabbert 2), or from a derivative of the Biblical name
Tobias.
Japanese: variously written, usually
with characters meaning ‘door’ or ‘earth’ for the first character and
‘department’ or ‘side’ for the second. None are common in Japan.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4