Meaning and Name Origin
Lothar \l(o)-thar\ as a boys' name is of Old German origin, and the meaning of Lothar is "famous warrior". The character Lothario in an early 18th-century English play gave this name connotations for awhile of a libertine or a careless seducer of women.
For more information, see also the related boy name Luther.
Lothar is an uncommonly occurring given name for males. Lothar is also an unusual surname for all people. (2000 U.S. Census)
Displayed below is an analysis of the popularity of Lothar and affiliated names. The only prominent alternative form of Lothar (#unlisted) rated in the Top 1000 is Luther. Adoption of this boy name was at its apex during 1880-1889 and is now significantly lower, with the form Luther becoming less in vogue. (2014 Birth Statistics)
Lothar is pronounced similarly to Louther. Like Lothar, this name is not frequently used.