This 2:1 ratio defines the octave. The second tone, which is the octave of the first tone, is created by faster vibrations and generates a higher pitch than the one vibrating at 440 cycles per second. The two tones in an octave sound very similar.
More info about the name Zahara. Zahara originates in Hebrew language and means radiance. It is a feminine form of Zohar. Some sources also suggest the Arabic origin and the meaning shining. The name is rather rare in English-speaking countries.
Samara is a female given name. It is of Hebrew and Arabic origin, and its meaning is guardian or protected by God. The section History and Origin of this page contains content from the copyrighted Wikipedia article Samara (given name); that content is used under the GNU Free Documentation License (GFDL).