Question: Chien-gris and Molossus of Epirus, are a breed of what?

Context paragraphs:
Northern Epirote Declaration of Independence: The Northern Epirote Declaration of Independence occurred on February 28, 1914, as a reaction to the incorporation of Northern Epirus into the newly established Principality of Albania.  The region of Northern Epirus, which corresponds to modern-day southern Albania, came under the control of the Greek forces during the Balkan Wars of 1912–13.  However, the subsequent Protocol of Florence assigned it to the newly established Albanian state, a decision that was rejected by the local Greek population.  As the Greek army withdrew to the new border, a Panepirotic Assembly was organized by the representatives of Northern Epirus in Gjirokastër (Greek: Argyrokastro).  Given the fact that union of Northern Epirus with Greece had already been dismissed by the European Great Powers, they decided that only autonomy or alternatively an international occupation would be appropriate for the region.  Finally, Georgios Christakis-Zografos, the head of the assembly, declared the independence of the Autonomous Republic of Northern Epirus.

Alexander I of Epirus: Alexander I of Epirus (Ancient Greek: Ἀλέξανδρος Α' τῆς Ἠπείρου , 370 BC – 331 BC), also known as Alexander Molossus (Ἀλέξανδρος ὁ Μολοσσός ), was a king of Epirus (350–331 BC) of the Aeacid dynasty.

Cragaleus: In Greek mythology, Cragaleus ( ; Greek "Κραγαλεύς") was a son of Dryops who dwelt in the land Dryopis next to a spring which was believed to have appeared at a place where Heracles hit the earth with his club.  He was renowned as just and wise, and was one day visited by Apollo, Artemis, and Heracles who asked him to act as an arbiter in their argument as to which of the three should become patron of Ambracia, Epirus.  Apollo argued that the city should belong to him on account of the fact that Epirus was once conquered by his son Melaneus, and that he assisted the Ambraciotes in the war against the natives of Epirus, and brought law and order to Ambracia.  Artemis reminded that it was she who saved the Ambraciotes from the tyrant Phalecus, having sent a lioness to kill him.  Finally, Heracles brought up the fact that it was he who destroyed the many non-Greek peoples of Epirus for trying to steal the kine of Geryon from him, and that the Corinthians, who later came to Epirus and founded Ambracia, were his descendants.  Cragaleus considered Heracles' argument the most convincing and declared him the winner.  Apollo was enraged and turned Cragaleus into stone.  Since then, the Ambraciotes sacrificed to Apollo the Saviour, but believed their city to belong to Heracles and the Heracleidae, and honored Cragaleus with sacrifices as well.

Molossus (son of Neoptolemus): In Greek mythology, Molossus (Greek: Μολοσσός) was the son of Neoptolemus and Andromache.  He was the eponymous founder of the Molossians, an ancient Greek tribe that inhabited the region of Epirus located in northwestern Greece.  Molossus had two brothers, Pielus and Pergamus (the latter named after the citadel of Troy), who were also sons of Neoptolemus and Andromache.

Molossus of Epirus: The Molossus of Epirus (Greek: Μολοσσός της Ηπείρου) is a large dog breed originating from Greece.  It is a livestock guardian that has been bred since the age of Alexander the Great for protecting livestock from carnivorous mammals including the wolf, European jackal and the brown bear in the mountainous regions of Greece, especially Epirus.  The Molossus is a pure Greek breed and is believed to be one of the main ancestors of today's Molosser breeds, such as the English Mastiff and the Neapolitan Mastiff,

Chien-gris: The Chien-gris a.k.a. Gris de Saint-Louis ("Grey St. Louis Hound") was a breed of dog, now extinct, which originated in Medieval times.  Like the Chien de Saint-Hubert it was a scenthound, and formed part of the royal packs of France, which were composed, from about 1250 till 1470, exclusively of hounds of this type.  According to King Charles IX, (1550–1574) they supposedly were introduced to France through Saint Louis (i.e. King Louis IX, 1226–1270), who had encountered these hounds while a prisoner during the Crusades, and subsequently received some as a gift.  Old writers on hunting liked to ascribe an ancient and remote origin to their hounds, and these were claimed to be originally from Tartary.

Epirus: Epirus ( ) is a geographical and historical region in southeastern Europe, now shared between Greece and Albania.  It lies between the Pindus Mountains and the Ionian Sea, stretching from the Bay of Vlorë and the Acroceraunian mountains in the north to the Ambracian Gulf and the ruined Roman city of Nicopolis in the south.  It is currently divided between the region of Epirus in northwestern Greece and the counties of Gjirokastër, Vlorë, and Berat in southern Albania.  The largest city in Epirus is Ioannina, seat of the region of Epirus, with Gjirokastër the largest city in the Albanian part of Epirus.

Molosser: Molosser is a category of solidly built, large dog breeds that all descend from the same common ancestor.  The name derives from Molossia, an area of ancient Epirus, where the large shepherd dog was known as a Molossus.

Deidamia II of Epirus: Deidamia or Deidameia (Greek: Δηϊδάμεια ) or Laodamia (Greek: Λαοδάμεια ) (died c. 233 BC) was a Greek princess, daughter of Pyrrhus II of Epirus, king of Epirus.  After the death of her father and that of her uncle Ptolemy, she was the last surviving representative of the royal Aeacid dynasty in Epirus.  She had a sister, Nereis, who married Gelo of Syracuse.  During a rebellion in Epirus her sister sent her 800 mercenaries from Gaul.  Part of the Molossians supported her, and with the aid of the mercenaries she briefly took Ambracia.  The Epirotes, however, determined to secure their liberty by extirpating the whole royal family, resolved to put her to death; she fled for refuge to the temple of Artemis, but was murdered in the sanctuary itself by Milo, a man already responsible of matricide, who shortly after this crime committed suicide.  The date of this event cannot be accurately fixed, but it occurred during the reign of Demetrius II in Macedonia (239–229 BC), and probably in the early part of it.

Cestrinus: In Greek mythology, Cestrinus was the only son of Helenus and Andromache.  According to Pausanias, Cestrinus was upset when Andromache's son Molossus succeeded Helenus to the throne of Epirus.  Taking a group of Epirotian volunteers, he claimed the region of Epirus north of the River Thyamis and it is because of him that the region was named Cestrine.  According to another tradition, Cestrinus was king of Cimmerian Bosporus, being equated with King "Genger".

Supporting paragraphs: Chien-gris Molossus of Epirus
Answer: dog