Sonneck is a surname of German origin. It is a relatively uncommon name. Information regarding its specific origin and etymology is limited, but surnames ending in "-eck" are often topographical, referring to a corner, edge, or angle of land, possibly denoting a person who lived near such a feature. The "Sonn-" prefix likely relates to "Sonne," the German word for sun, potentially suggesting a sunny corner or location.
The surname has been found in various regions historically associated with German-speaking populations. Further research into genealogical records would be necessary to determine the precise geographic distribution and history of specific individuals and families bearing the name Sonneck.