Disclosed herein are example embodiments for behavioral fingerprinting via inferred personal relation. For certain example embodiments, at least one indication of personal relation for at least one authorized user may be inferred via at least one user-device interaction, and the at least one indication of personal relation may be incorporated into at least one behavioral fingerprint that is associated with the at least one authorized user, with the at least one behavioral fingerprint including one or more indicators of utilization of one or more user devices by the at least one authorized user.