Yes, it is quite common for one person to have two or more Priority Pass memberships, usually because they hold multiple premium credit cards that offer the benefit as a perk. For example, if you have both a Chase Sapphire Reserve and an Amex Platinum, you will likely have two separate Priority Pass accounts. While this might seem redundant, it can actually be beneficial. Different versions of the pass have different guest policies; one might allow two free guests while the other allows none. Additionally, Priority Pass Select memberships issued via Amex currently do not include "Lounge Experience" credits at airport restaurants, whereas Chase-issued passes often still do. You cannot "merge" these accounts; you must carry both physical (or digital) cards and present the one that offers the best benefit for the specific lounge or restaurant you are visiting at that moment.