"Variant of Andrew"
The name Andru is commonly a male name from the "Scottish" origin.
Andru is a shortened variant of Andrew, the English form of the Greek name Andreas, made by dropping the final syllable. It has no meaning of its own separate from that underlying name. The clipped shape is not unique to English; similar short forms of Andreas and Andrei occur in other European naming traditions.
Andrew means "Manly, Courageous, Brave.".
The pronunciation of Andru is AN-droo.