Biometric authentication matching using grip detection

In embodiments of an electronic device having a biometric authentication system and grip detection sensor, an authentication circuit is coupled to the biometric authentication sensor and grip detection sensor. The biometric authentication sensor is configured to receive a biometric input sample. The grip detection sensor is configured to identify an orientation of a hand of a user relative to the biometric authentication sensor. The authentication circuit determines a priority of multiple biometric templates based on the orientation and authenticates the biometric input sample based on the priority of the multiple biometric templates.