While some people use Spencer itself as a unisex name, others prefer these options:
* Spenser - This is the original spelling of the name, and some consider it more feminine.
* Spenc - This is a shorter, more modern alternative.
* Spencera - This is a less common variation that adds a feminine ending.
* Spence - This is a surname that can also be used as a first name, and some consider it more gender-neutral.
Ultimately, the choice of a feminine form for Spencer depends on personal preference.