- Fitam (Fi/tz and Tam)
- Fam (F/itz and T/am)
- Tafitz (Ta/m and Fitz)
- Tamitz (Tam and F/itz)
- Vacksong (Vack/er and Song)
- Songer (Song and Vack/er)
- Tit (Titz but better)
- Singer (songer but better)
- Fitz and the Tamtrums
- After they first meet, Fitz says that Sophie was right—he did like the twins.
- Linh says that Tam likes brunettes, and Fitz has brown hair.
- Tam says Fitz's gift was perfect.
- Tam is worried about Fitz when Fitz got attacked by Umber
- Tam tries to help Fitz and Sophie by taking out the shadowflux in them
- Tam trains with Lady Zillah to learn to control the shadowflux better so he can help Fitz
- Fitz is worried when Lady Gisela takes Tam to the Neverseen
Similarities and Differences
- They both attended Exillium
- They both hate people in their family. Fitz with Alvar and Tam with his parents.
- They both have one sister
- They're both official Black Swan members.
- They both have blue eyes and dark hair
- They're both Sophie's friends
- They both live in the Lost Cities
- They both passed the Foxfire entrance exam
- They both did Foxfire's Exillium training
- They both care fiercely for their sister.
- Fitz is a Telepath while Tam is a Shade.
- Fitz has teal eyes while Tam has silvery-blue eyes.
- Tam doesn't like his parents and isn't close to them, while Fitz is.
- Tam is a twin and Fitz is not.
- Fitz comes from a highly honored family while Tam, not so much.
- Fitz has two siblings while Tam only has one.