Question: Wallaroo is any of three closely related species of moderately large macropod, intermediate in size between the kangaroos and the wallabies, the  word "wallaroo" is from which Australian Aboriginal language of the Yuin–Kuric group that is spoken in the region of Sydney, New South Wales, "walaru"?

Context paragraphs:
Yuin: The ethnonym Yuin refers to a group of Australian Aboriginal peoples from the South Coast of New South Wales.  All Yuin people share in common, ancestors who spoke as their first language, one or more of the Yuin language dialects, including "Djiringanj," "Thaua", "Walbanga", or "Wandandian" and "Dhurga" language (from Narooma to Nowra)

Thawa language: Thawa (Thaua, Dhawa, Thauaira) is an extinct Australian Aboriginal language of New South Wales.  It is sometimes classified with Dyirringany as "Southern Coastal Yuin", though it's not clear how close the two varieties actually were.

Central New South Wales languages: The Central New South Wales languages (Central NSW) are a geographic grouping of Australian Aboriginal languages within the traditional Pama–Nyungan family, partially overlapping the Kuri subgroup of the Yuin–Kuric languages.

Wallaroo: Wallaroo is any of three closely related species of moderately large macropod, intermediate in size between the kangaroos and the wallabies.  The word "wallaroo" is from Dharug "walaru".  In general, a large, slim-bodied macropod of the open plains is called a "kangaroo"; a small to medium-sized one, particularly if it is relatively thick-set, is a "wallaby": most wallaroos are only a little smaller than a kangaroo, fairly thickset, and are found in open country.  All share a particular habit of stance: wrists raised, elbows tucked close into the body, and shoulders thrown back, and all have a large, black-skinned rhinarium.

Dharug language: The Sydney language, also referred to as Darug or Iyora (Eora), is an Australian Aboriginal language of the Yuin–Kuric group that is spoken in the region of Sydney, New South Wales.  It is the traditional language of the Darug and Eora peoples.

Dyirringany language: Dyirringany (Djiringanj) is an extinct Australian Aboriginal language of New South Wales.  It is not listed in Bowern (2011), but the people are ethnically Yuin.  The only attestation of the language are manuscripts and a grammar dating from 1902.  It is sometimes classified with Thawa as "Southern Coastal Yuin".

Dhurga language: Dhurga (Thurga) is an Australian Aboriginal language of New South Wales spoken around the Bega Valley (southern Yuin) area.  The language is tonal.  The language does not have a word for "thank you"; in an interview with Graham Moore, a Yuin Elder who spoke the language, Moore stated, "We didn't have a word for thank you as we were quite a giving people."

Ngalakgan language: Ngalakan (Ngalakgan) is an Australian Aboriginal language.  It has not been fully acquired by children since the 1930s.  It is one of the Northern Non-Pama–Nyungan languages formerly spoken in the Roper river region of the Northern Territory.  It is most closely related to Rembarrnga.

Maung language: Maung (Mawung, Mawng, Gun-marung) is an Australian aboriginal language spoken by the Maung people on the Goulburn Islands, off the north coast of Arnhem Land, in the Northern Territory of Australia.  Maung is closely related to Iwaidja language which occupies the northwestern corner of the opposite mainland.  This is a language that belongs to the Iwaidjan language family of Non-Pama–Nyungan languages.  As of 1983, there were 200 speakers of the language. (Ethnologue)

Wallaroo Parish: Wallaroo Parish is one of the 54 parishes of Murray County, New South Wales, a cadastral unit for use on land titles.  It is bounded by the Murrumbidgee River in the west, Ginninderra Creek in the south and Gooromon Ponds in the east.  The Australian Capital Territory has also formed a small part of the boundary since 1909, after a small part of land in the parish at was transferred to the Commonwealth.  This area is just to the west of Dunlop.  The Wallaroo road is the main road in the area, which comes off the Barton Highway.  The parish is similar to the locality of Wallaroo.

Supporting paragraphs: Wallaroo Dharug language
Answer: Darug