No, a Marriott Bonvoy account is strictly an individual membership, and your wife cannot officially use your rewards number for her own solo travel. According to Marriott’s terms and conditions, the person whose name is on the account must be the one staying in the room to earn "Elite Night Credits" and points. However, in 2026, Marriott makes it very easy to transfer points between accounts for free. If your wife has her own account, you can transfer up to 100,000 points per year to her, allowing her to book her own stays using your shared pool of rewards. If you are traveling together, you can simply book the room in your name and add her as an "additional guest" so she can check in early or use the amenities. Just remember that if you are not physically present at the hotel, she will not be entitled to your elite benefits (like free breakfast or lounge access) unless the reservation was booked as a "Gift Award" using your points through the official Marriott customer service line.