In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Islam has made charitable actions and deeds very flexible and accommodating to encourage people to do such actions more. Waqf is a charitable endeavour and a voluntary action which is encouraged. Among the flexibilities of Waqf is that a person can stipulate numerous beneficiaries to benefit from the Waqf. Therefore, a person can have multiple beneficiaries of the Waqf.
And Allah Alone Knows Best
Mufti Faraz Adam,
I Waqf Shariah Advisor