Names starting with Bu

Buddy - English name derived from the vocabulary, which may be an altered form of "brother" or, more likely, a variant spelling of British butty, meaning "companion." 
Butch - Originally a short from of the occupational surname Butcher. Later it was used to address a stranger in a sort of derogatory manner. For example, "Listen here, Butch..."
Buz - Anglicized form of Hebrew Buwz, meaning "contempt." In the bible, this is the name of a son of Nachor.
Burke - Variant spelling of German Burk, meaning "castle, fort, protection."
Bussaba - Thai name meaning "flower."
Burgundy - English name derived from the wine name, from the name of a place in France which got its name from Latin Burgundiones, literally meaning "highlanders." May also sometimes be given as a color name.
Burk - From the Germanic word burg, meaning "castle, fort, protection." Used as a short form of longer names containing the same element.
Bud - Short form of English Buddy, meaning "companion."
Buonfiglio - Italian name meaning "good son."
Bunty - English name, probably derived from an old nursery rhyme about "babybunting."
Bunny - English pet form of Latin Berenice, meaning "bringer of victory."
Bubu - Egyptian name meaning "gives light."
Buppha - Thai name meaning "flower."
Busiris - Egyptian name of a king who killed visitors to his city, meaning "temple of Osiris."
Bunko - Japanese name meaning "literary child."
Burney - Irish surname transferred to forename use, from an Anglicized form of Gaelic Mac Biorna "son of Biorna," hence "bear."
Burkhard - German name composed of the elements burg "castle, fort, protection" and hard "brave, strong," hence "strong protection."
Buziba - African Ganda name meaning "deep water; open water."
Budde - African Ganda name meaning "night; occasion; time; weather."
Buikhu - Egyptian name meaning "the best."
Bulus - Arabic form of Latin Paulus, meaning "small."
Buster - English slang term for someone who breaks things transferred to forename use, originally derived from the verb bust, meaning "to break, smash," hence "breaker, destroyer, smasher."
Burt - Short form of English Burton, meaning "fortified settlement."
Buru - African Shona name meaning "bull."
Buck - From the American English pet name for a "high-spirited young man," from the vocabulary word buck, meaning  "male deer or goat."
Buddha - Buddhist title given to anyone who has become fully enlightened, has overcome greed, ignorance, hate, etc, and has become liberated from all suffering, meaning "awakened, enlightened." The most famous Buddha was Gautama Buddha.
Burbuqe - Albanian name meaning "bud; sprout."
Budur - Feminine form of Arabic unisex Badr, meaning "full moon."
Bujar - Albanian name meaning "generous."
Burim - Albanian name meaning "fountain; the source."
Bukuroshe - Albanian name meaning "beauty." 
Burton - English surname transferred to forename use, composed of the Old English elements burh "fortress, protection" and tun "enclosure, settlement," hence "fortified settlement."
Buffy - Pet form of English Elizabeth, meaning "God is my oath."
Butrus - Arabic form of Latin Petrus, meaning "rock, stone."
Butannaziba - African Ganda name meaning "before the night."
Buwz - Hebrew name meaning "contempt." In the bible, this is the name of a son of Nachor.
Bujare - Feminine form of Albanian Bujar, meaning "generous."
Buenaventura - Spanish form of Italian Bonaventura, meaning "good fortune."
Bujune - African Nyoro name meaning "sorrow." This name is sometimes given to a child born during time of sorrow.
Buduica - Variant spelling of Celtic Boudica, meaning "victory."
Bulut - Turkish name meaning "cloud."