There are 16 different types of hemagglutinin (H) proteins and nine different types of neuraminidase (N) proteins. This is how names such as H1N1 or H3N2 are acquired. However, the pandemic H1N1 influenza is different because it was created from a combination of human, swine and bird flu viruses.
Last name: Butte. This interesting surname of English origin with variant spellings But, Butt, Butte, Bute, etc., is derived from the middle English personal name But(t) of unknown origin, perhaps originally a nickname meaning short and stocky and akin to the late middle English butt meaning thick end or stump.
The English word sierra, rugged range of mountains having an irregular or jagged profile, is a borrowing of Spanish sierra. In Spanish, sierra literally means saw, but the word is also used in the extended meaning line or group of mountains with a jagged profile.. As a further example of how a word meaning saw can become a word meaning mountain range, we need only mention the Sawtooth Mountains of central Idaho.