The Commonwealth "Realms"

Previously called "dominions" there are currently 15 nations, along with Britain, that recognize Queen Elizabeth II as their head of state.
They all are former British colonies.

Queen Elizabeth is the titular monarch of all 15 realms, but her authority is delegated to an appointed Governor General.

Country
Modern country established
Full Political
Independence
Last knighted Prime Minister
First native Governor-General appointed
Any Female Governor-Generals?
British honours³ allowed
Queen on banknotes?
Australia
1901
1985¹
Sir Robert Menzies
(1949 - 1966)
1931
No
Yes
No
Canada
1867
1983¹
Sir Robert Bordon
(1911 - 1920)
1952
Yes
(1984-1990)
(1999- )
No
Yes
New Zealand
1907
1987¹
Sir Robert D. Muldoon
(1975 - 1984)
1972
Yes
(1990-1996)
(2001- )
No
Yes
Jamaica
1655
1962
Sir Donald Burns Sangster
(1967)
1962
No
Only for Gov. Gen.
No
Papua New Guinea
1945
1975
Sir Michael Somare
(2002 - )
?
No
Yes
No
The Bahamas
1718
1973
Sir Lynden O. Pindling
(1967 - 1992)
?
Yes
(2001- )
Yes
No
Grenada
1967
1974
(none)
?
No
Yes
Yes*
Belize
1862
1981
(none)
?
Yes
(1981-1993)
Yes
Yes
Tuvalu
1975
1978
(none)
?
No
Yes
Yes*
Barbados
1627
1966
Sir Grantley H. Adams
(1954 - 1958)
1967
Yes
(1990-1995)
Grants own knighthoods
No
Solomon Islands
1893
1978
Sir Allan Kemakeza
(2001 - )
?
No
Yes
No
Antigua and Barbuda
1967
1981
(none)²
?
Yes
(1999- )
Yes
Yes*
St. Lucia
1803
1979
(none)²
?
Yes
(1997- )
Yes
Yes*
St.Vincent and the Grenadines
1763
1979
Sir James
Fitz-Allen Mitchell
(1984 - 2000)
?
No
Yes
Yes*
St. Kitts and Nevis
1967
1983
(none)²
?
No
Yes
Yes*

¹ nearly full independence had been previously granted by the 1931 Statue of Westminster.
² position of Prime Minister did not exist prior to independence.
³ includes knighthoods and titles, as well as decorations such as the Order of the Garter.
* shared currency.