10 most difficult et­y­mol­o­gy riddles

The word mammoth comes from the mythology of the Siberian peoples who believed they lived underground - as dead ones were found in the ground from time to time.

The princess was the wife of the Marquis John Campbell, the governor of Canada.They lived in 1878-1883 in Louiseville, in a province named in her honor.

Martin Van Buren was the eighth president of the United States. 'Van' suggests Dutch origin of his surname, but the capitalized form indicates anglicised version - like Eddie Van Halen (as opposite to Dutch lower-case Vincent van Gogh).

The phrase "Bermuda Triangle" was first used by Vincent Gaddis in the cover article for the 1964 February issue of the magazine Argosy. His stories and statements on the Bermuda Triangle have been criticized for being inaccurate and misleading. He has also drawn strong criticism for ignoring possible natural explanations and inventing mysteries where none exist.

"Ferrari" is the third most common surname in Italy. The word has the same root as Italian "ferro" (iron) or Latin "ferrum" (thus, Fe for iron).

Harry Fox has indeed introduced trotting steps to this dance. Originally, the foxtrot was supposed to be a simple, smooth and relaxation giving dance. After years, it has become very technical, and today is called "the world's hardest stroll".

The Tyrrhenian Sea is part of the Mediterranean Sea off the western coast of Italy. It is named for the Tyrrhenian people, identified since the 6th century BCE with the Etruscans of Italy.

Pardo is a term used in the Portuguese and Spanish colonies in the Americas to refer to the multiracial descendants of Europeans, Indigenous Americans, South Asians, and West Africans. The term "pardo" is more commonly used to refer to mixed-race Brazilians, individuals with varied racial ancestries.

A tsunami is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions have the potential to generate a tsunami. The word originated in Japan, and is a combination of two words: tsu (which means "harbor") and nami (which means "wave").

The name "Gibraltar" is the Spanish derivation of the Arabic name Jabal Ṭariq, meaning "Mountain of Ṭariq". Following a raid in 710, a predominately Berber army under the command of Tariq ibn Ziyad crossed from North Africa in April 711 and landed somewhere in the vicinity of Gibraltar (though most likely not in the bay or at the Rock itself). Tariq's expedition led to the Islamic conquest of most of the Iberian peninsula.