Edited for Privacy
I like alliteration in combos with one middle, but I’m not a fan of three alliterative names in a row. However, I do think [name_m]Samuel[/name_m] [name_f]Sparrow[/name_f] [name_u]Shay[/name_u] works, since the “sh” in [name_u]Shay[/name_u] breaks up the pattern a little bit.
[name_m]Hi[/name_m] there.
I feel like in general doing alliteration with three names is just too much. I’d love to give my thoughts on the first names though!
[name_u]Remington[/name_u] [name_u]Rowan[/name_u] [name_u]Rain[/name_u]- I think that [name_u]Remy[/name_u] is cute, but don’t care for [name_u]Remington[/name_u] since it reminds me of the kind of gun. A reason my dh would love it…[name_u]Rowan[/name_u] is very handsome.
[name_u]Elias[/name_u] [name_m]Ezekiel[/name_m] [name_m]Emrys[/name_m]-I don’t dislike three vowels in a row as much. [name_u]Elias[/name_u] is really cool. My favorite ‘[name_m]Eli[/name_m]’ name by far.
[name_m]Damon[/name_m] [name_u]Denver[/name_u]* [name_u]Dean[/name_u]-Not bad, but I don’t care much for [name_m]Damon[/name_m].
[name_m]Gareth[/name_m] Galahad [name_m]Gregory[/name_m]-[name_m]Gareth[/name_m] is really nice. Masculine, but not overly macho. [name_u]Unique[/name_u], but still really simple to say & spell.
[name_u]Micah[/name_u] Malachite [name_u]Monroe[/name_u]*-I don’t love [name_u]Micah[/name_u], but it’s totally fine.
[name_m]Samuel[/name_m] [name_f]Sparrow[/name_f] [name_u]Shay[/name_u]*-I love [name_m]Samuel[/name_m]. The mns are cool. It’s just too essy for me.
[name_m]Killian[/name_m] [name_m]Kalixto[/name_m] [name_u]Kai[/name_u]-I love [name_m]Killian[/name_m]. Much prefer the ‘C’ spelling. Takes away the word ‘kill’. I absolutely would not do KKK though!
[name_m]Hezekiah[/name_m] [name_m]Hector[/name_m] [name_m]Helios[/name_m]-This is nmns, but kind of cool.
[name_m]Boaz[/name_m] [name_m]Bartholomew[/name_m] [name_m]Benjamin[/name_m]-Hm. I don’t care for this, but it’s different.
Taran [name_m]Thaddeus[/name_m] [name_m]Thomas[/name_m]*-I want to like this, but it sounds like one of those names that’s too masculine for a girl but too feminine for a boy.
[name_m]Daniel[/name_m] D’artagnan [name_u]Dean[/name_u]-[name_m]Daniel[/name_m] is fine. Sort of tired.
[name_m]Raphael[/name_m] [name_u]Rowan[/name_u] [name_u]Rhys[/name_u]-I like [name_m]Raphael[/name_m]. It’s artsy & exotic, but not over the top. Prefer [name_m]Rafael[/name_m], so you could do the nn [name_u]Rafe[/name_u].
[name_u]Remington[/name_u] [name_m]Rhett[/name_m] [name_u]Royal[/name_u]-Too much.
[name_m]Azaiah[/name_m] [name_m]Anakin[/name_m] [name_m]Alastair[/name_m]-Hm. Kind of cool. [name_f]Star[/name_f] Wars fan?
[name_m]Fagan[/name_m] [name_u]Fallon[/name_u] Foxglove-I don’t don’t care for [name_m]Fagan[/name_m], but Foxglove is a cool mn!
[name_f]Hope[/name_f] this helps. 
Of all these, I find the only one somehow pulling it off to be Samuel Sparrow Shay… it does seem to work. All the others are a bit too much for me, though. I think alliteration needs to be limited to two names, if you want to use it. Three matchy names is too much.
I like:
[name_m]Samuel[/name_m] [name_f]Sparrow[/name_f] [name_u]Shay[/name_u]
[name_u]Micah[/name_u] Malachite [name_u]Monroe[/name_u]
[name_u]Elias[/name_u] [name_m]Ezekiel[/name_m] [name_m]Emrys[/name_m]
I don’t mind:
[name_m]Killian[/name_m] [name_m]Kalixto[/name_m] [name_u]Kai[/name_u]
[name_m]Boaz[/name_m] [name_m]Bartholomew[/name_m] [name_m]Benjamin[/name_m]
[name_m]Raphael[/name_m] [name_u]Rowan[/name_u] [name_u]Rhys[/name_u]
Some suggestions:
[name_m]Raphael[/name_m] [name_m]Ruben[/name_m] [name_u]Riley[/name_u]
[name_u]Remington[/name_u] [name_u]Roscoe[/name_u] [name_u]River[/name_u]
[name_u]Elias[/name_u] [name_m]Edison[/name_m] [name_m]Emrys[/name_m]/Elias Everett Ezekiel
[name_m]Gareth[/name_m] Galahad [name_m]George[/name_m]/[name_m]Gethin[/name_m] Galahad [name_m]George[/name_m]/[name_m]Gideon[/name_m] [name_m]George[/name_m] [name_m]Gregory[/name_m]
[name_u]Micah[/name_u] Maximilian [name_u]Monroe[/name_u]/Micah Montgomery Marlon
[name_m]Hezekiah[/name_m] [name_m]Helios[/name_m] [name_m]Henry[/name_m]/[name_m]Hezekiah[/name_m] [name_m]Horatio[/name_m] [name_m]Hayes[/name_m]/[name_m]Hamish[/name_m] [name_m]Hezekiah[/name_m] [name_m]Hartley[/name_m]
[name_m]Boaz[/name_m] [name_m]Bartholomew[/name_m] [name_m]Bennett[/name_m]/Boaz Bramwell Benjamin
Taran [name_m]Theodore[/name_m] [name_m]Thomas[/name_m]
[name_m]Dashiell[/name_m] D’artagnan Dexter/[name_m]Daniel[/name_m] [name_m]Dimitrious[/name_m] Declan
[name_m]Azaiah[/name_m] [name_m]Anakin[/name_m] [name_m]Aurelius[/name_m]/[name_m]Azaiah[/name_m] [name_m]Amadeus[/name_m] [name_u]Auden[/name_u]
[name_m]Fagan[/name_m] [name_m]Fitzwilliam[/name_m] [name_m]Forrest[/name_m]/[name_m]Fabian[/name_m] [name_m]Francisco[/name_m] [name_u]Finch[/name_u]