Fionn is an ancient Gaelic name, as in Fionn Mac Cumhaill. Fiona is merely a feminine variant coined by Macpherson.
Una is an Anglicisation of Irish name Oonagh and also a feminisation of Uno Italian, Unus, Latin = one.
Lorna is a feminisation of the Scottish place name Lorne.
Miranda was famously coined by Shakespeare, using the etymological roots - Mir - to wonder/admire + Amanda - lovable to create a name that has meaning in the play.
Stella just means star, coined by Sydney, also refers to Stella Maris - star of the sea which is an epithet for Virgin Mary.
Olivia derives from Oliva, olive, and is a variant on the name Olive. Oliva di Palermo was an early Christian martyr.
All of these names have roots in the language.
In contrast to names these days that literally invented out of thin air with no reference to etymology like Lagreesha or Jimberly etc