Question: What holding company under the parent company Abu Dhabi United Group bases it's identity around the cognomen "city"? 

Context articles: Abu Dhabi Ports
City Football Group
Capital Gate
City FC
Abu Dhabi United Group
Abu Dhabi Aviation
Dalma Mall
Pak-Arab Refinery
Abu Dhabi Sports
Masdar

Abu Dhabi Ports (Arabic: موانئ أبوظبي‎ ‎ ) (formally Abu Dhabi Ports Company ADPC) was established in March, 2006 by Emiri Decree No.
 (6), as a master developer of ports and industrial zones in Abu Dhabi.
 Abu Dhabi Ports was formed as part of the restructuring of the commercial ports sector in the emirate, and was given control and regulatory enforcement power over all commercial ports assets previously owned by the Abu Dhabi Seaports Authority (ADSA).
 Khalifa Port, which was opened in September 2012, together with the development of Kizad (Khalifa Industrial Zone Abu Dhabi) are the major achievements of Abu Dhabi Ports to date.
 Through the planning and development of ports and industrial zones, the company continues to play a vital role in propelling economic growth in the emirate of Abu Dhabi.
The City Football Group (CFG) is the holding company established to oversee the creation and administration of a network of linked clubs and other footballing operations.
 The company is run as a holding company under parent company the Abu Dhabi United Group (ADUG) along with Chinese part-owners China Media Capital and CITIC Capital.
 The company's aim is to own a team on each continent, each with the identifier "City" in its name.
Capital Gate is a skyscraper in Abu Dhabi adjacent to the Abu Dhabi National Exhibition Centre designed with a striking lean.
 At 160 m and 35 stories, it is one of the tallest buildings in the city and inclines 18° to the west.
 The owner and developer of Capital Gate is Abu Dhabi National Exhibitions Company.
 The tower (also known as the Leaning Tower of Abu Dhabi) is the focal point of the Capital Center/Abu Dhabi National Exhibition Centre master development.
City FC or just City is usually used as short-hand to refer to one of Manchester City F.C., New York City FC or Melbourne City FC, which are all association football clubs owned by the City Football Group, an organisation which bases it's identity around the cognomen "City".
The Abu Dhabi United Group for Development and Investment (ADUG), مجموعة أبوظبي الاتحاد للتنمية والاستثمار,' is a United Arab Emirates (UAE) based private equity company owned by Sheikh Mansour bin Zayed Al Nahyan, member of the Abu Dhabi Royal Family and Minister of Presidential Affairs for the UAE.
 The primary interest of the group is its ownership of City Football Group, a worldwide organisation most notably controlling Manchester City F.C, Melbourne City F.C and New York City F.C., as well as several other international football clubs, although it holds interests in various other endeavours outside of the sporting world also.
Abu Dhabi Aviation Co. (Arabic: شركة طيران أبوظبي‎ ‎ ) () is an airline based in Abu Dhabi, United Arab Emirates.
 It serves oil-fields and economic facilities in the United Arab Emirates and other Arab states.
 Its main base is Abu Dhabi International Airport.
 Abu Dhabi Aviation is the largest commercial helicopter operator in the Middle East, operating 58 helicopters (15 AgustaWestland AW139s, 24 Bell 412s, 19 Bell 212s), and 3 fixed-wing aircraft (DHC-8).
 The company employs over 900 personnel, including 150 pilots and 340 aircraft maintenance engineers.
 The bulk of the company's business activity is in support of Abu Dhabi offshore oil and engineering and construction companies.
 Other business activities include medical evacuation, survey, photography and charter.
 All aerial spraying of crops in the UAE and the majority of aerial spraying in Oman is carried out by ADA.
Dalma Mall is a large shopping mall located in Abu Dhabi.
 The mall is prominently situated on the Abu Dhabi–Tarif–Al Ain highway, opposite Mohammed Bin Zayed City and at the heart of Abu Dhabi's growth corridor.
 A short distance from Maqta Bridge and Abu Dhabi International Airport, Dalma Mall is one of Abu Dhabi’s shopping and tourist destination and features over 400 stores.
 The mall opened in 2010.
Pak-Arab Refinery (PARCO) is a fully integrated energy company and is the second largest company in the Pakistan’s corporate sector by sales (PKR 250BN+) and has an asset base of over PKR 141 billion.
 PARCO, a Joint Venture between Government of Pakistan and the Emirate of Abu Dhabi was incorporated as a public limited company in 1974.
 The Government of Pakistan holds 60% of the share holding while 40% of the shares are held by Emirate of Abu Dhabi through its Abu Dhabi Petroleum Investment Company L.L.C. (ADPI), a holding company with majority shareholding (75%) held by International Petroleum Investment Company (IPIC) and minority shareholding (25%) held by OMV, which is the largest listed manufacturing company in Austria.
Abu Dhabi Sports (Arabic: أبوظبي الرياضيّة‎ ‎ ) is an Arabic television station.
 It broadcasts from Abu Dhabi, capital of the United Arab Emirates and is owned by Abu Dhabi Media Abu Dhabi Sports Channel is an UAE Arab satellite channel broadcast from Abu Dhabi headed by Yaqoob Al Saadi.
Masdar, also known as the Abu Dhabi Future Energy Company, is a renewable energy company based in Abu Dhabi, United Arab Emirates.
 The company's mission is to invest in renewable energy and clean technology in Abu Dhabi and around the world for both financial and social returns.
 Masdar is an important part of Abu Dhabi's efforts to diversify its economy beyond oil production.
 It pursues an "integrated, holistic" business model that merges higher education, research and development, finance, and the development of large-scale renewable energy projects and sustainable communities.
 Masdar has three business units including Masdar Clean Energy, Masdar City, and Masdar Capital.
 Masdar's mission is complemented by the Masdar Institute, an independent research university.
 Masdar is a subsidiary of the Mubadala Development Company and was founded in 2006.