The two ethnic groups may share the ethnonym due to them having been a single ethnic group before the 6th century. The name Sporoi, mentioned by Procopius as the common name for Sclaveni (South Slavs) and Antes (East Slavs), has been theorized to have been the ethnonym Serb.
A genetic study of Sorbs showed that they share greatest affinity with Poles, while results were compared to Serbia and Montenegro due to historical hypotheses, showing that "The Sorbs were most different to Serbia and Montenegro, likely reflecting the considerable geographical distance between the two populations."
During World War I one of the most important commanders in the Serbian army was Pavle Jurišić Šturm, a Serbian general of Sorbian origin. In 1944 Sorb writer Jurij Češka was killed on his way to join Yugoslav Partisans. He introduced modern poetry in Sorbian literature.
According to Emperor Constantine VII's De Administrando Imperio (950s), a Serbian prince (known in historiography as the Unknown Archon or Serb Archon) led the Serbs from their homeland, White Serbia, to settle in the Balkans during the reign of Byzantine Emperor Heraclius (610–641). The work states that he was the progenitor of the first Serbian dynasty (known as the Vlastimirović), and that he died before the settlement of the Bulgars (680).
According to German historian Ludwig Albrecht Gebhardi (1735–1802), the Serb archon was a son of Dervan, who was the Duke (dux) of the Surbi, east of the Saale. This theory was supported by Miloš Milojević, and Relja Novaković included the possibility that they were relatives in his work.
Serbo-Croatian works on Sorbs
- Mitar S. Vlahović (1930). Lužički Srbi i njihova domovina. Društvo prijatelja Lužičkih Srba u Beogradu.
- Mićo M. Cvijetić (1995). Lužički srbi i Jugosloveni: uzajamne literarne veze u periodici za književnost, nauku i kulturu : 1840-1918. Matica srpska.
- Josip Milaković (1920). Lužički Srbi: predavanje u društvu za narodno prosjvećivanje. Zemaljska Štamparija.
- Lužički Srbi u prošlosti i sadašnjosti. 1927.
- Lužički srbi i njihov vođa, Dr. Arnošt Muka. Društvo prijatelja lužičkih srba. 1929.
- Deutsche Welle. "Lužički Srbi - njemački Slaveni protestantske vjere" (in Croatian). Retrieved 6 December 2014.
- Tomasz Kamusella (15 January 2009). The Politics of Language and Nationalism in Modern Central Europe. Palgrave Macmillan. ISBN 978-0-230-55070-4.
As explained above in detail, the Serbs and the Sorbs may share their ethnonym, because they had formed a single ethnic group, perhaps prior to the 6th century.
- Veeramah, KR; Tönjes, A; Kovacs, P; Gross, A; Wegmann, D; Geary, P; Gasperikova, D; Klimes, I; Scholz, M; Novembre, J; Stumvoll, M. "Genetic variation in the Sorbs of eastern Germany in the context of broader European genetic diversity". Eur J Hum Genet. 19: 995–1001. doi:10.1038/ejhg.2011.65. PMC 3179365. PMID 21559053.
- Telegraf. "KO SU LUŽIČKI SRBI: Upoznajte našu neuništivu braću sa severa (FOTO) (VIDEO)" (in Serbian). Retrieved 6 December 2014.
- Project Rastko. "Lužički Srbi-Reč na književnoj večeri u Etnografskom muzeju u Beogradu, 1984" (in Serbo-Croatian). Retrieved 6 December 2014.
- Miloš Blagojević (2001). Državna uprava u srpskim srednjovekovnim zemljama. Službeni list SRJ. p. 14.
- Sava S. Vujić, Bogdan M. Basarić (1998). Severni Srbi (ne)zaboravljeni narod. Beograd. p. 40.
- Miloš S. Milojević (1872). Odlomci Istorije Srba i srpskih jugoslavenskih zemalja u Turskoj i Austriji. U državnoj štampariji. p. 1.
- Relja Novaković (1977). Odakle su Sebl dos̆il na Balkansko poluostrvo. Istorijski institut. p. 337.