If we have a boy his middle name will be definitely be [name_m]Thaddeus[/name_m], an important family name for us. What first names pair well with [name_m]Thaddeus[/name_m] in the middle? We tend to like pretty unique and somewhat unusual names.
I’m not sure how many on my masterlist suit your taste, but I went down it, anyway! Here’s what I liked the sound of.
[name_u]Alton[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Ansel[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Archer[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Asa[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Aubin[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Behan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Benno[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Breccan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Cassian[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Cedric[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Clive[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Conan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Cyril[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Darrow[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Dashiell[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Destry[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Dexter[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Dorian[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Egan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Elian[/name_m] [name_m]Thaddeus[/name_m]
Emre / [name_m]Imre[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Esmond[/name_m] [name_m]Thaddeus[/name_m] ([name_m]Desmond[/name_m] [name_m]Thaddeus[/name_m] is another possibility)
[name_m]Evander[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Fabian[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Jarah[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Jonah[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Jovan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Kiro[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Lachlan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Leander[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Lucan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Lucian[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Macsen[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Peregrine[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Piran[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Rhys[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Ridley[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Roscoe[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Sabin[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Samson[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Slade[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Stellan[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Tabor[/name_m] [name_m]Thaddeus[/name_m]
Swoon! Your list is amazing! We already had some of these on our list ([name_m]Ansel[/name_m], [name_m]Benno[/name_m], [name_u]Rhys[/name_u]), but there are so many great ones I’ve never considered! My favorites are:
[name_m]Cedric[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Kiro[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Cyril[/name_m] [name_m]Thaddeus[/name_m]
Thank you!
Here’s a little list (ill try to not duplicate the above list!)
[name_u]Abbott[/name_u]
[name_u]Tiernan[/name_u]
[name_u]Adair[/name_u]
[name_m]Audric[/name_m]
[name_m]Bjorn[/name_m]
[name_m]Brooks[/name_m]
[name_m]Kaiser[/name_m]
[name_m]Calhoun[/name_m]
[name_u]Carbry[/name_u]
[name_m]Cian[/name_m]
[name_u]Dane[/name_u]
[name_u]Donnelly[/name_u]
[name_m]Errol[/name_m]
[name_m]Hawthorne[/name_m]
[name_u]Jory[/name_u]
[name_m]Madoc[/name_m]
[name_u]Orion[/name_u]
[name_u]Windsor[/name_u]
[name_m]Tomlin[/name_m]
Good luck and congrats! 
This is hard because the other comments have a lot of good suggestions
[name_m]Caspar[/name_m]/[name_m]Kaspar[/name_m] [name_m]Thaddeus[/name_m] (nn [name_m]Cas[/name_m])
[name_m]Killian[/name_m]/[name_m]Cillian[/name_m] [name_m]Thaddeus[/name_m] (nn [name_m]Kian[/name_m]/[name_m]Cian[/name_m] or [name_m]Ian[/name_m])
[name_m]Griffin[/name_m] [name_m]Thaddeus[/name_m] (nn [name_m]Griff[/name_m] or [name_u]Finn[/name_u])
[name_m]Beckett[/name_m] [name_m]Thaddeus[/name_m] (nn [name_u]Beck[/name_u] or [name_u]Kit[/name_u])
[name_u]Kieran[/name_u] [name_m]Thaddeus[/name_m] (nn [name_m]Kian[/name_m])
Audin [name_m]Thaddeus[/name_m]
[name_u]Ari[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Finnian[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Arlo[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Byron[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Sage[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Sterling[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Asa[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Elijah[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Eli[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Everett[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Merrick[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Perrin[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Rowan[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Adriel[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Ezra[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Oren[/name_m] [name_m]Thaddeus[/name_m] and [name_u]Rowan[/name_u] [name_m]Thaddeus[/name_m] were the first to come to mind!
[name_u]Quincy[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Beckham[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Finley[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Warner[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Heathcliff[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Connolly[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Arden[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Tierney[/name_u] [name_m]Thaddeus[/name_m]
Kierney [name_m]Thaddeus[/name_m]
[name_m]Cecil[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Axel[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Ezekiel[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Micah[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Percy[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Torin[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Leon[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Zephyr[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Soren[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Zane[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Oakley[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Quinn[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Roan[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Morgan[/name_u] [name_m]Thaddeus[/name_m]
I think a short first name would would best with [name_m]Thaddeus[/name_m]:
[name_m]Leo[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Ford[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Kit[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Quinn[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Taj[/name_u] [name_m]Thaddeus[/name_m]
[name_m]Otto[/name_m] [name_m]Thaddeus[/name_m]
[name_u]Luca[/name_u] [name_m]Thaddeus[/name_m]
[name_u]Jude[/name_u] [name_m]Thaddeus[/name_m]