how are they named?
They are named after places or things they hit before the formal start of naming
Tropical cyclone
The practice of using names to identify tropical cyclones goes back many years, with systems named after places or things they hit before the formal start of naming. 
why does tropical cyclone originated over the seas Because the energy through the evaporation of water from the ocean surface, which ultimately recondenses into clouds and rain when moist air rises and cools to saturation what are its sizes? There are a variety of metrics commonly used to measure storm size, the most common includes the radius of maximum wind, the radius of 34-knot wind, the radius of outermost closed isobar (ROCI), and the radius of vanishing wind how is it formed? When the difference between temperatures aloft and sea surface temperatures is the greatest
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Tropical cyclone [SEP] Naming
The practice of using names to identify tropical cyclones goes back many years, with systems named after places or things they hit before the formal start of naming. The system currently used provides positive identification of severe weather systems in a brief form, that is readily understood and recognized by the public. The credit for the first usage of personal names for weather systems is generally given to the Queensland Government Meteorologist Clement Wragge who named systems between 1887 and 1907. This system of naming weather systems subsequently fell into disuse for several years after Wragge retired, until it was revived in the latter part of World War II for the Western Pacific.