Here is a selection of some cool names for cats which all start with the letter B.
| B.B. | Benson | Boniface |
| Babe | Bentley | Bonkers |
| Babes | Beowulf | Bonnie |
| Babushka | Bernard | Bonzo |
| Baby | Bernie | Boo |
| Baby Bear | Bert | Booboo |
| Babycakes | Bertha | Boogeyman |
| Babycat | Bessie | Boots |
| Babydoll | Bethany | Bootsie |
| Babysocks | Betty | Bootsy |
| Bacchus | Biddy | Bootz |
| Badger | Big Cat | Boris |
| Baggins | Bigben | Boss |
| Bagheera | Bigboy | Bosscat |
| Bagpipes | Bigfoot | Bouncer |
| Bagpuss | Bigguy | Bracken |
| Bailey | Biggy | Brahms |
| Baldrick | Bigkitty | Brains |
| Bali | Bigmac | Bramble |
| Bambam | Bigmomma | Brandi |
| Bambi | Bigpaws | Brandy |
| Bambino | Bigwig | Braveheart |
| Bandit | Bill | Brew |
| Bandito | Billiejean | Bridget |
| Bandy | Billy | Briggy |
| Banjo | Billygoat | Brighteyes |
| Banzai | Bimbo | Brillo |
| Barbarella | Bingo | Bristles |
| Barnaby | Bingy | Brittany |
| Barney | Binka | Brittney |
| Barry | Binkie | Brooklyn |
| Bart | Binks | Brownie |
| Basil | Binky | Bruiser |
| Bastian | Binx | Bruno |
| Batgirl | Birdie | Brutus |
| Batman | Biscuit | Bubba |
| Bax | Biscuits | Bubble |
| Baxter | Bitster | Bubblegum |
| Beanie | Bitsy | Bubbles |
| Beans | Bjorn | Bubby |
| Beany | Black | Bucky |
| Beanz | Blackbeard | Buddy |
| Bear | Blackbeauty | Budger |
| Beast | Blackberry | Buffy |
| Beauty | Blackjack | Bugs |
| Beavis | Blackpearl | Bullet |
| Bebe | Blacky | Bullseye |
| Becky | Blarney | Bully |
| Beelzebub | Blinky | Bumblebee |
| Beettlejuice | Blobcat | Bumbles |
| Beige | Blondie | Bungee |
| Bella | Blossom | Bungle |
| Bellaboo | Blue | Bunny |
| Bellatrix | Bluebell | Bushbaby |
| Belle | Blur | Bushy |
| Bellestar | Bob | Butch |
| Bellini | Bobby | Butterball |
| Bellissima | Bobcat | Buttercup |
| Beluga | Bobo | Butterscotch |
| Ben | Bobtail | Butthead |
| Benedict | Bogey | Button |
| Benjamin | Bolly | Buttons |
| Benny | Bonbon | |
| Benoit | Bones |