Shanks might have some ties to xebec as well especially if they’re related
- Whitebeard = Blackbeard
- Teach was a pirate apprentice under whitebeard
- Both used the quake fruit
- He structures his crew in the same way as whitebeard
- He’s shanks’s aka mid gen Roger’s main rival
- Both named after the real life Blackbeard
- Blackbeard once he gains is third fruit will likely be considered the worlds strongest man just like whitebeard
You don’t have to be a 1 for 1 copy of a character to parallel them. You can also have parallels with multiple characters
Even if Shanks is related it doesn't mean much, more likely Shanks is related to the Figarland guy but from a glance you can say he and Shanks are opposites.
BB was an apprentice under WB but he betrayed completely WB and his principles. WB just wanted to have a family, an humble dream which is opposite to BB, he didn't give a damn about the OP and power in general (opposite to BB, Kaido, BM) while BB did what WB despised the most aka kill a member of his family, a brother he fought with for decades and, again, that was in order to gain power.
Shanks and him are rivals but more than that they hate eachother with a passion. You will never see BB and Shanks sit together with a cup of sake in their hands.
The name similarities are most likely a coincidence.
Imo when BB get the 3rd fruit and awakens the yami he will be known either as the moon god or, if getting that coincides with something else, the actual king of the world. These of course are speculations but in the end have the same weights than yours, this point is up in the air.
He has way way more points in common with Xebec, why should BB have his ship named after him? Also I think we just need some more infos about Xebec but you can bet they will further the BB - Xebec parallels.