Hazelnut
[ˈheɪzəlˌnʌt]Meaning
the fruit of the hazel tree, also called a cobnut or filbert
Background Story
The sources checked do not record hazelnut as a personal name, though a user-submitted entry on Behind the Name records it as a rare masculine given name in American English.
Temperament

Related Names
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Strictly feminine variant of Charlie
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English word meaning pleasant and charismatic, recorded as a masculine given name
Chestnut
Chestnut: the deciduous trees and shrubs of the genus Castanea, and the edible nuts they produce
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Haile
From Ge'ez ኀይል (hayl), meaning "power, force, strength".