Family History and Genealogy Resources by Surname
Lilienthal Surname Origin
(Origin German) Locality. The vale of lilies, from lilie, a lily, and thal, a vale; so Blumenthal, the vale of flowers. A town in Bremen, Hanover.
Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import; Arthur, William, M.A.; New York, NY: Sheldon, Blake, Bleeker & CO., 1857.
Lilienthal Surname Meaning and Family Facts
There is more to Lilienthal family history than the origin of your surname:
A Lilienthal Family History Thought:
'If you would not be forgotten,
As soon as you are dead and rotten,
Either write things worthy of reading,
Or do things worthy of writing.' --Benjamin Franklin, May 1738