Juan Carlos Sánchez Martínez
Juan Carlos Sánchez Martínez( born 27 July 1987), known as Juan Carlos, is a Spanish professional footballer who plays for CD Numancia as a goalkeeper.
Carlos Alonso Vargas
Carlos Alonso Vargas Tenorio( born 14 February 1999) is a Mexican professional footballer who plays for Liga MX club América.
Juan-Carlos Alonso
Juan- Carlos Alonso( born 8 March 1958) is a Spanish former professional racing cyclist.
He rode in one edition of the Tour de France, one edition of the Giro d'Italia and four editions of the Vuelta a España.
Algirdas Petrusevičius
Algirdas Petrusevičius( born 23 February 1937 in Klaipėda) is an anti-Soviet dissident, partisan and political prisoner, a leader in the creation of Lithuania's army, an inventor of weapons for guerrilla warfare, and a member of Lithuania's parliament from 1996 to 2000.
Juan Carlos Salazar
Juan Carlos Salazar is a well known Venezuelan singer and cuatro player.
Juan Carlos was born in , a small oil town in the State of Monagas.
Born to a singer, guitarist and cuatro player, Juan Carlos learned how to play cuatro and guitar by ear at an early age and took piano lessons in Fort Collins, Colorado.
Juan Carlos Salazar actually began his singing career by accident.
While in high school he was selected to play the “cuatro” for a fellow student who was to represent their school in a nationwide singing competition.
Three days before the big event, the singer developed an acute case of laryngitis.
Too late to retire the school from the contest, the principal searched desperately for a replacement.
The only student that knew the song was Juan Carlos.
At the age of 16, without ever taking a singing lesson, Juan Carlos walked to the center of the stage and trembling all over sang the song.
Upsetting all the favorites, Juan Carlos won first prize and national recognition.
Juan Carlos is an accomplished performer with over twenty years of experience.
He has performed internationally to “standing room only crowds” and in intimate settings in Venezuela, Dominican Republic, San Diego (CA), Miami, Orlando, Gainesville and Tampa (FL), Denver and Fort Collins (CO), San Juan (PR), Madrid (Spain), Bonn and Stuttgart (Germany), Brussels (Belgium), The Hague (Netherlands), Paris (France), London (England), Zurich and Berna (Switzerland).
Since 2009 he lives currently in Orlando, Florida State.
Juan Carlos Real
Juan Carlos Real Ruiz( born 15 March 1991), known as Juan Carlos, is a Spanish footballer who plays for SD Huesca as an attacking midfielder.
Carlos Alonso Bazalar
Carlos Alonso Bazalar Arostegui( born March 19, 1990 in Lima) is a Peruvian football midfielder.
He currently plays for Cienciano.
Juan Carlos I of Spain
Juan Carlos I( Juan Carlos Alfonso Víctor María de Borbón y Borbón- Dos Sicilias, born 5 January 1938) is a member of the Spanish royal family who reigned as King of Spain from November 1975 until his abdication in June 2014.
Juan Carlos is the grandson of Alfonso XIII, the last king of Spain before the abolition of the monarchy in 1931 and the subsequent declaration of the Second Spanish Republic.
Juan Carlos was born in Rome, Italy, during his family's exile.
" Generalísimo" Francisco Franco took over the government of Spain after his victory in the Spanish Civil War in 1939, yet in 1947 Spain's status as a monarchy was affirmed and a law was passed allowing Franco to choose his successor.
Juan Carlos's father, Juan, was the third son of King Alfonso, who had renounced his claims to the throne in January 1941.
Juan was seen by Franco to be too liberal and in 1969 was bypassed in favour of Juan Carlos as Franco's successor as head of state.
Juan Carlos spent his early years in Italy and came to Spain in 1947 to continue his studies.
After completing his secondary education in 1955, he began his military training and entered the General Military Academy at Zaragoza.
Later, he attended the Naval Military School, the General Academy of the Air, and finished his tertiary education at the University of Madrid.
In 1962, Juan Carlos married Princess Sophia of Greece and Denmark in Athens.
The couple had two daughters and a son together: Elena, Cristina, and Felipe.
Due to Franco's declining health, Juan Carlos first began periodically acting as Spain's head of state in the summer of 1974.
Franco died in November the following year and Juan Carlos became king on 22 November 1975, two days after Franco's death, the first reigning monarch since 1931; although his exiled father did not formally renounce his claims to the throne in favor of his son until 1977.
Expected to continue Franco's legacy, Juan Carlos, however, soon after his accession introduced reforms to dismantle the Francoist regime and begin the Spanish transition to democracy.
This led to the approval of the Spanish Constitution of 1978 in a referendum, which re-established a constitutional monarchy.
In 1981, Juan Carlos played a major role in preventing a coup that attempted to revert Spain to Francoist government in the King's name.
In 2008, he was considered the most popular leader in all Ibero- America.
Hailed for his role in Spain's transition to democracy, the King and the monarchy's reputation began to suffer after controversies surrounding his family arose, exacerbated by an elephant- hunting trip he undertook during a time of financial crisis in Spain.
In 2014, Juan Carlos, citing personal reasons, abdicated in favour of his son, who acceded to the throne as Felipe VI.
Juan Carlos Martín Corral
Juan Carlos Martín Corral( born 20 January 1988), known as Juan Carlos, is a Spanish professional footballer who plays for Girona FC as a goalkeeper.
Juan Carlos Pérez Frías
Juan Carlos Pérez Frías( born 27 July 1956), known as Juan Carlos, is a Spanish former professional footballer who played as a midfielder.

Question: Were Algirdas Petrusevičius and Juan-Carlos Alonso of the same nationality?
Answer: no