Here is a chart from prenoms.com that shows the popularity of
Maeva the last 80s years. If you scroll over the green parts on the chart, the usage of
Maeva seems to begin in 1970. It says 9 girls were born in
France with the name
Maeva. It seems to have gone up subsequently since and in 1988, it really skyrocketd.
According to tous-les-prenoms.com
Maeva first came into wide usage in 1975. It doesn't really give us a reason why it suddenly became popular in
France, just that the meaning of "welcome" was appealing to parents, and that it corresponds with a more traditional, yet old fashioned French name, Bienvenue, which has the same meaning as
Maeva.
http://legitnames.blogspot.com