What does Lothar mean?
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 on this name, 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)
The only prominent alternative form of Lothar (#unlisted) is Luther. Adoption of these boy names was at its apex during the years 1880-1889 (usage of 0.932%) and is now significantly lower, with Luther becoming less in vogue. Displayed below is an analysis of the popularity of Lothar and affiliated names. (Top 1000 Baby Names Records, 2014)
Lothar is pronounced similarly to Louther. Like Lothar, this name is not frequently used.