Classy, cowboy, gentlemen, very-underused~ long but fun!

I’m looking for something that would work well for a boy anywhere in the English speaking world.
A name people haven’t heard or rarely heard.
Something that might pop up in English lit or an American cowboy or a great great grandfathers name, or an old surname, a ‘virtue’ type word?

We have a few names we are mulling over now but I want to find two to really consider.

Rules:
•must start with letters: D, G, I, K, N, T
•can’t end with t, o, r, n, ne, ce, c, k
•3 syllables long in at least one valid probunciatin
•flexible with origins but can’t be recently made up & no Greek/Egyptian gods or African tribal names…
Preference given to: English, [name_m]German[/name_m], Native Am, Norse/ Scandanavian, Latin

Some We like but have been vitoed and we will not be using them~
[name_m]Thackeray[/name_m]
Kaspian
[name_u]Sequoia[/name_u]
[name_m]Benedict[/name_m]
[name_m]Dominic[/name_m]
[name_m]Isaiah[/name_m]
[name_m]Leander[/name_m]
[name_m]Lysander[/name_m]
[name_m]Mathias[/name_m]
[name_m]Nathaniel[/name_m]
[name_m]Oliver[/name_m]
[name_m]Solomon[/name_m]
[name_f]Verity[/name_f]
[name_m]Xavier[/name_m]
[name_m]Zavier[/name_m]
[name_m]Nicolai[/name_m]
[name_u]Nicola[/name_u]

The middle options are
~ [name_m]Thayer[/name_m]
~ [name_m]Hawthorne[/name_m]

[name_u]Dakota[/name_u], [name_m]Daniel[/name_m]/Deniel, [name_m]Davide[/name_m], Devereux, [name_m]Dmitri[/name_m], [name_m]Gabriel[/name_m], [name_m]Immanuel[/name_m], [name_m]Ignatius[/name_m], [name_m]Ishmael[/name_m], [name_m]Israel[/name_m], Nekoda, Theophil, [name_m]Tobias[/name_m], [name_m]Thaddeus[/name_m], [name_m]Timothy[/name_m]

[name_m]Dashiell[/name_m], Digory/[name_m]Diggory[/name_m], [name_u]Delaney[/name_u]/[name_f]Delancey[/name_f], [name_m]Demetrius[/name_m], [name_m]Demarcus[/name_m], Demothi

[name_m]Gregory[/name_m], Gunnbjorg, [name_m]Gamaliel[/name_m], Gawonii, Guyapi

[name_m]Ichabod[/name_m], Isembard, [name_f]Ingeborg[/name_f], [name_m]Ivanhoe[/name_m] or [name_f]Isabeau[/name_f] (have an O sound though)

Karoli, [name_u]Kennedy[/name_u], [name_m]Koenraad[/name_m], Kriemhild, Kestejoo, Kwahu

[name_m]Nicodemus[/name_m], [name_m]Nehemiah[/name_m], Nahiossi, Notaku

[name_m]Theobald[/name_m]/Theobold, [name_m]Thierry[/name_m], Thorbjorg, Thorgisl, Thorketill, Tuari, Takoda

D: [name_m]Dalziel[/name_m], [name_m]Diggory[/name_m], [name_m]Deveraux[/name_m], [name_m]Donahue[/name_m], [name_m]Doherty[/name_m], [name_u]Donnelly[/name_u], [name_f]Delancey[/name_f], [name_u]Delaney[/name_u], [name_m]Darius[/name_m].

G: [name_f]Galilee[/name_f], [name_m]Gillespie[/name_m], Gedaiah, [name_m]Galloway[/name_m], [name_u]Garcia[/name_u], [name_m]Gamaliel[/name_m], [name_f]Genoa[/name_f], [name_m]Gavriel[/name_m].

I: [name_m]Ignatius[/name_m], [name_u]Ilia[/name_u], [name_m]Isidore[/name_m], [name_m]Israel[/name_m], [name_m]Ibraham[/name_m].

K: [name_m]Kaniel[/name_m], [name_m]Kemuel[/name_m], [name_m]Kasimir[/name_m], [name_m]Kavanagh[/name_m], [name_m]Kennelly[/name_m], Kokoda, [name_u]Konstanty[/name_u], [name_u]Kornelis[/name_u].

N: [name_m]Namaka[/name_m], [name_m]Nazareth[/name_m], [name_u]Nakia[/name_u], [name_u]Nakotah[/name_u] / [name_u]Nakota[/name_u], [name_u]Nairobi[/name_u], [name_m]Nabiel[/name_m], [name_m]Naphtali[/name_m], [name_m]Nathaniel[/name_m], [name_u]Nazaret[/name_u], [name_m]Nickleby[/name_m], [name_m]Nicasi[/name_m], [name_u]Nuriel[/name_u].

T: [name_u]Tierney[/name_u], [name_u]Tennessee[/name_u], [name_m]Thaddeus[/name_m], [name_m]Thackeray[/name_m], Thoroughgood, [name_m]Tobias[/name_m], [name_m]Tobiah[/name_m].

Kassius
[name_u]Ivory[/name_u]
[name_m]Keanu[/name_m]