Yes, eligible family members can accompany or join the principal visa holder in the U.S. through a dependent visa. Dependent visas are available for spouses and unmarried children under 21 of individuals holding specific non-immigrant visas. For example, spouses and children of H-1B visa holders can apply for the H-4 visa, while those of F-1 students can apply for the F-2 visa. Dependent visas allow dependents to reside in the U.S. for the duration of the principal visa holder's authorized stay.