Tobias Beckett is a fictional male in the Star Wars series. The character was portrayed on screen by Woody Harrelson. Tobias Beckett name doesn't sound very sci fiction does it. Although you did have Luke as in Luke Skywalker so I guess anything is possible.
Tobias is new to the Star Wars canon and appears in the Solo - A Star Wars Story. Tobias is the leader of a group of thieves who offers Han Solo and Chewbacca a job. The objective of the job is to rob a moving train on a snow covered planet for a gangster. Although we've not see any images of Jabba, the Hutt, speculation is rife that that is who is behind the operation. Another possible antagonist is Enfys Nest, a leader of a group of marauders who is female. Enfys wears a mask leading to it possibly being Qi'ra.
Tobias warns Han Solo that if he expects everyone to betray him then he'll not be disappointed. Whilst it might imply that it could be Qi'ra, the lead female in the film, it could also imply what will happen in Han's future, a certain incident on Bespin. More precisely when Lando Calrissian betrayed Han, Princess Leia and others to Darth Vader.