Sabas can be a girl’s name as well as a boy’s name (what is called in French a prénom épicène): see here.

There is an old tradition which is to give the first names of the child’s godfather and godmother as second or third name (the order does not matter). A child can then have a second or third name that belongs to the opposite gender. What is common, though, is then to give the matching name in its feminine or masculine variant (ex: a girl with a godfather named Georges could have “Georgette” as 2nd name).

Another christian tradition consists in giving a second or third name that invokes a saint, which is supposed to put the baby under his/her protection. In some families, it is common for instance to give “Marie” as second name even to boys.