Family name. The family name, positioned first, is passed on by the father to his children. It is estimated that there are around one hundred family names in common use, although some are far more common than others. The name Nguyá»n is estimated to be used by almost 40% of the Vietnamese population.
The Doldrums . The Doldrums, also known as the Equatorial Convergence Zone. The axis, or a portion of the broad trade wind of the tropics. This axis is the dividing line â¦ between the southeast trades and the northeast trades, of the Southern and Northern hemispheres converging around the equator.
The Importance of the Doldrums. The doldrums, or ITCZ, are located roughly at the Equator, but they also migrate with the seasons. They are 50 to 250 miles wide, so the rain produced by the rising air is significant.In the Northern Hemisphere's summer, the doldrums migrate as far as 25 degrees north latitude up to southern Asia.earn about the location of the doldrums and the mechanisms that create them. Understand how they are part of the general circulation of Earth and the importance of the doldrums on a global scale.