Other arguments were advanced for the extensive Luwian presence in western Anatolia in the late second millennium BC. In the Old Hittite version of the Hittite Code, some, if not all, of the Luwian-speaking areas were called "Luwiya". Widmer (2007) has argued that the Mycenaean term "ru-wa-ni-jo", attested in Linear B, refers to the same area. but the stem *"Luwan-" was recently shown to be non-existent. In a corrupt late copy of the Hittite Code the geographical term "Luwiya" is replaced with "Arzawa" a western Anatolian kingdom corresponding roughly with Mira and the Seha River Land. Therefore, several scholars shared the view that Luwian was spoken—to varying degrees—across a large portion of western Anatolia, including Troy ("Wilusa"), the Seha River Land ("Sēḫa" ~ "Sēḫariya", i.e., the Greek Hermos river and Kaikos valley), and the Mira-Kuwaliya kingdom with its core being the Maeander valley. In a number of recent publications, however, the geographic identity between Luwiya and Arzawa was rejected or doubted. In the post-Hittite era, the region of Arzawa came to be known as Lydia (Assyrian "Luddu", Greek Λυδία), where the Lydian language was in use. The name "Lydia" has been derived from the name "Luwiya" (Lydian *"lūda"- < *"luw(i)da"- < "luwiya"-, with regular Lydian sound change "y" > "d"). The Lydian language, however, cannot be regarded as the direct descendant of Luwian and probably does not even belong to the Luwic group (see Anatolian languages). Therefore, none of the arguments in favour of the Luwian linguistic dominance in Western Asia Minor can be regarded as compelling, although the issue continues to be debated.