In 2018, 73 is the most common age for an American (U.S.) Mavis who is registered female with the Social Security Administration. It is the 1, 880th most common female first name for living U.S. citizens.
― Anonymous User 10/18/2018
2
The name Mavis was given to 358 girls born in the US in 2016. More than 99.9 percent of people with the first name Mavis are female.
― Anonymous User 6/7/2017
2
The name Mavis was given to 263 girls born in the US in 2015.
Mavis may have been popularised by Marie Corelli, but it certainly wasn't 'first used' by her. Birth records in the UK show it in use in the sixteenth century and consistently, if rarely, since then.