I love [name_m]Tad[/name_m], but would be inclined to use it as a nickname.
Thomas* and Robert…Tad and [name_m]Bo[/name_m]
[name_m]Thomas[/name_m] and Edwin…. [name_m]Tad[/name_m] and [name_m]Ned[/name_m]
[name_m]Thomas[/name_m] and Leonard…. [name_m]Tad[/name_m] and [name_m]Leo[/name_m]
[name_m]Thomas[/name_m] and Nathaniel…. [name_m]Tad[/name_m] and [name_m]Nat[/name_m]
[name_m]Thaddeus[/name_m] and August….Tad and [name_m]Auggie[/name_m] or [name_m]Gus[/name_m]
[name_m]Thaddeus[/name_m] and Phineas….Tad and Phinn
[name_m]Thaddeus[/name_m] and Nathaniel….Tad and [name_m]Nat[/name_m]
[name_m]Thaddeus[/name_m] and Sebastian…. [name_m]Tad[/name_m] and [name_m]Seb[/name_m] or Bass
[name_m]Thaddeus[/name_m] and Prudence…. [name_m]Tad[/name_m] and [name_f]Prue[/name_f]
[name_m]Thaddeus[/name_m] and Sybil…. [name_m]Tad[/name_m] and Sybie
[name_m]Thaddeus[/name_m] and Clementine…. [name_m]Tad[/name_m] and [name_m]Clem[/name_m]
*Really any T first name with a D middle name could easily use [name_m]Tad[/name_m] as a nickname.