It looks like a variant of
Lisa. I would pronounce it like you do. I much prefer
Linnea. Lisea really does look made up. LIS-ee would be kind of awful for Lisea. Like a really horrible misspelling of Lissy or Lissie. Lissea or Lisséa might be better. Not sure. They look more authentic maybe because they are closer to
Linnea. Or even Lissaea (
Linnaea). The sound isn't bad but it doesn't feel authentic.