Names That Mean Fiery

Fiammetta, from the Italian word for flame, has both femininity and fire. Fiammetta could make a good alternative to more conventional Italian girls' names like Giovanna. 
 Fiammetta has some romantic, if not fiery, references. It was the pseudonym of Boccaccio's beloved in the Decameron and other works (the subject of a famous Pre-Raphaelite painting by Dante Gabriel Rossetti); and another Fiammetta was a famous courtesan and lover of Cesar Borgia. Currently there is an Italian model named Fiammetta Cicogna.

Fiammetta

Aydan has been a popular alternate spellings of Aidan, though it has been declining in usage since 2008. While 106 boys were still given the name in 2024, this was less than half the number it was given to a decade earlier in 2014 when it was chosen for 239 boys.
 
Aydan is also a Turkish and Azerbaijani feminine name, relating to the moon, however the two names are pronounced differently: AY-duhn vs. IE-dan.

Aydan

A Turkish twist on the trend for ruler names.
Spelled Håkan, this is the Swedish form of Haakon. It may also be a Native American name meaning "fiery".

Hakan

The striking Ignatius is making a truly surprising comeback, sparked by its selection by not one but two celebrities — Cate Blanchett and Julianne Nicholson. With its fiery qualities and magical feel, Ignatius might just fit in with Blaze, Griffin, Ember, or Atticus.
 
While Ignatius is now associated with fire, it originally derived from the Ancient Etruscan Egnatius, a name of unknown meaning. The spelling was changed to make it closer to the sound-alike Latin word, ignis, and thus, the fire meaning was born.
 
The name of several saints including the founder of the Catholic Jesuit order, Ignatius was once reasonably well-used in the US, ranking in the Top 1000 in the early 20th century. Out of favor since 1930, it has been slowly trending upwards since the early 2000s, and as of 2023, it is given to around 90 boys each year.
 
Other notable bearers include: Charles Ignatius Sancho, a writer, abolitionist, composer, and the subject of a recent novel by Paterson James; Ignatius James, an Australian singer and producer; Ignatius Jones, a Fillipino-Australian rock singer and journalist; and Ignatius Ganago, a Cameroonian footballer. Writer of the Sherlock Holmes stories, Arthur Conan Doyle, also has Ignatius as a middle name. 
 
One big selling point of Ignatius is that despite its grandeur, it has several down-to-earth nicknames: Iggy, Nate, and Nash. Plus, the Spanish variation, Ignacio, is long-standing feature in the US Top 1000, so while Ignatius might be rare, its close relative is definitely not. 
 
Love Ignatius but can't quite commit to it? You could consider Indigo or Inigo with the nickname Iggy, or a similar-but-more-popular choice, like Azarius, Ozias, Ziggy, or Elias.