Megachile mendocensis
Megachile mendocensis is a species of bee in the family Megachilidae.
It was described by Silvana Patricia Durante, Alberto H. Abrahamovich and Mariano Lucia in 2006.
Ann MacEwen
Ann MacEwen née Radford also known as Ann Maitland( 1918–2008) was a British architect and town planner- known for championing National Parks and resisting the car's domination of planning in the UK.
2004 Davidoff Swiss Indoors – Doubles
Mark Knowles and Daniel Nestor were the defending champions, but lost in the semifinals this year.
Bob Bryan and Mike Bryan won in the final 7 – 6, 6 – 2, against Lucas Arnold and Mariano Hood.
Megachile santacrucensis
Megachile santacrucensis is a species of bee in the family Megachilidae.
It was described by Silvana Patricia Durante, Alberto H. Abrahamovich and Mariano Lucia in 2006.
Goodbye Luv'
Goodbye Luv' is a compilation album by Dutch girl group Luv' released by CNR/ Carrere Records in 1981 after the formation announced its break- up.
It features hit singles taken from the studio albums" True Luv'"( 1979) and" Forever Yours"( 1980) and scored in the charts between 1979 and 1981( Ooh, Yes I Do, Ann- Maria, One More Little Kissie, My Number One, Tingalingaling).
2003 CAM Open Comunidad Valenciana – Doubles
Mahesh Bhupathi and Leander Paes were the defending champions but did not compete that year.
Lucas Arnold and Mariano Hood won in the final 6 – 1, 6 – 7, 6 – 4 against Brian MacPhie and Nenad Zimonjić.
Rafael Velarde Echevarría
Rafael Velarde Echevarría was a government Minister of Peru under José Balta and Mariano Ignacio Prado.
Mariano Caulín
Mariano Caulín( born 22 May 1938) is a Uruguayan rower.
He competed at the 1960 Summer Olympics and the 1964 Summer Olympics.
Rafael Velarde Echevarría
Rafael Velarde Echevarría was a government Minister of Peru under José Balta and Mariano Ignacio Prado.
1995 Wimbledon Championships – Boys' Doubles
Martin Lee and James Trotman defeated Alejandro Hernández and Mariano Puerta in the final, 7 – 6, 6 – 4 to win the Boys' Doubles tennis title at the 1995 Wimbledon Championships.

Question: Do Ann Macewen and Mariano Caulín have the same nationality?
Answer: no