Question: The Steuart family of Maryland was a prominent political family in the early History of Maryland which dates back to when Europeans began exploring the area, starting with the Italian/Venetian named what?

Context paragraphs:
History of Toowoomba, Queensland: The history of Toowoomba begins in the 19th century.  Europeans began exploring and settling in the area from 1816 on-wards.  By the end of the 1840s the rich lands around Toowoomba were being used for agriculture.  12 suburban allotments at Drayton were surveyed in 1849.  Small commercial settlements were growing with schools and churches also being built.  The first council election took place in 1861 and the telegraph connection to Brisbane was established in 1862.  Between 1868 and 1886, several new railway lines from Toowoomba were opened.  Throughout the 21st century the city prospered with new hospitals, large industrial buildings and education facilities established.  Brisbane West Wellcamp Airport was opened in 2014.

Steuart family: The Steuart family of Maryland was a prominent political family in the early History of Maryland.  Of Scottish descent, the Steuarts have their origins in Perthshire, Scotland.  The family grew wealthy in the early 18th century under the patronage of the Calvert family, proprietors of the colony of Maryland, but would see their wealth and status much reduced during the American Revolution, and the American Civil War.

History of Maryland: The recorded history of Maryland dates back to when Europeans began exploring the area, starting with the Italian/Venetian John Cabot (c. 1450 – c. 1500), exploring the coast of the continent of North America for England in 1498.  The first European settlements were made in 1634, when the English arrived in significant numbers and created a permanent colony.  Maryland was notable for having been established with religious freedom for Roman Catholics.  Like other colonies of the Chesapeake Bay, its economy was based on tobacco as a commodity crop, cultivated primarily by African slave labor, although many young people came from Britain as indentured servants in the early years.

Maryland Square: "Maryland Square", later known as "Steuart Hall", was a mansion owned by the Steuart family from 1795 to 1861, located on the western outskirts of Baltimore, Maryland, at the present-day junction of West Baltimore and Monroe streets.  In the first year of the American Civil War, the property was confiscated by the United States Federal Government as its owner, George H. Steuart, a former United States Army officer, had resigned his commission to fight in the Confederate Army, in the Army of Northern Virginia as a brigadier general.

Meyer Cardin: Meyer Melvin Cardin (14 July 1907 – 12 July 2005) was an American jurist who served as an associate judge on the Supreme Bench of Baltimore City.  He served one term in the Maryland state legislature and was a member of a prominent political family, his brother, son and grandnephew all being elected to state or national positions.

Read family of Delaware: The Read family of Delaware were a prominent political family in the 18th and 19th centuries in Delaware, New Jersey and Pennsylvania.  It was founded by John Read, a wealthy Englishman who was one of the founders of Chestertown, Maryland.

Jarvis Hospital: Jarvis U.S. General Hospital was a military hospital founded in Baltimore, Maryland, in 1861, at the beginning of the American Civil War, for the care of wounded Federal soldiers.  The hospital was built on the grounds of Maryland Square, the former residence of the Steuart family, which had been confiscated by the Federal government at the outbreak of war.  The hospital closed at the end of the war.

Moore family (Carolinas): The Moore family was a prominent political family of North and South Carolina during the 18th and 19th centuries.  They are believed to be related to or descended from Roger O'Moore, a leader of the Irish Rebellion of 1641.  The family is most closely associated with the Cape Fear coastal region around Wilmington.  Several members of the family held prominent political positions in colonial North and South Carolina, were officers in the Continental Army during the American Revolutionary War, or held high positions in the United States federal government during the early years of the republic.

Sharif family: The Sharif family (Urdu: ‎ ) is a prominent political family of Pakistan, based in the Pakistani province of Punjab.  Along with the Bhutto family, the Sharif family has dominated for much of Pakistan's political history since 1983.  The Sharif family is of Kashmiri origin settled in Pakistani Punjab and uses the title of "Mian".  Muhammad Sharif, the father of the former Prime Minister of Pakistan Nawaz Sharif, migrated from Jati Umra, Amritsar, India, after the creation of Pakistan in 1947.  He was a businessman who founded the Ittefaq Group in 1939 in Lahore.

Bhutto family: The Bhutto family (Sindhi: ڀُٽو‎ ) is a prominent political family of Pakistan, based in the province of Sindh.  Bhuttos have played a prominent role in Pakistani politics and government.  The family has held the leadership of the Pakistan People's Party (PPP), since its inception in 1967.  A family of ethnically Muslim Rajputs, based in Sindh province, the Bhuttos have been settled in the area for over two centuries.  They migrated to Sindh from Rajputana (present-day Rajasthan, India) under Sheto Khan Bhutto in the early 18th century.

Supporting paragraphs: Steuart family History of Maryland
Answer: John Cabot