Albanian may have evolved from Dacian, Thracian, or Illyrian, but it is still disputed which language was its ancestor.
Because of the fragmentary evidence that has survived, it is unknown how closely related these languages were, i.e., whether they belonged to a common branch of the Indo-European language family or merely a Sprachbund. However, no linguist proposes that the Liburnian language---which is generally considered to have been closely akin to the Venetic language---is part of the same IE branch as the Greek language.