Congratulations on your fourth. Your children’s names make a great sibling set! As your preferences currently stand, you still have a very wide playing field so I can see why it would be hard to begin the search. You could narrow the field down a bit by taking out names starting with W, J and E so each child has their own initial.
Both of your boy’s names have strong appeal. Their popularity has remained steady throughout the last century with neither being ranked any lower than 200 on the SSA charts. Whereas [name_u]Eloise[/name_u] only rejoined the top 1000 in 2008 after a 43 year gap. So even though you’ve said you like old names for boys, based on this I’d say you’re after a timeless name that shares the same warm friendly vibes as [name_m]Jack[/name_m] and [name_m]Wesley[/name_m] do. Let’s see what fits this criteria.
[name_m]Samuel[/name_m] “[name_u]Sam[/name_u].” Instantly came to mind. It’s such a friendly name and undoubtedly a timeless name. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Samuel[/name_m]. There’s also [name_m]Samson[/name_m] for something a bit different, although in this sibling set it may be a bit sibilant heavy.
[name_m]Charles[/name_m] “[name_u]Charlie[/name_u].” A name that’s never out of style, with such a great nickname option. In fact, [name_u]Charlie[/name_u] would be right at home as a first name in this set. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_u]Charlie[/name_u]. [name_m]Miles[/name_m] also fits in with your style. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Miles[/name_m].
[name_m]Nathaniel[/name_m] “[name_m]Nate[/name_m].” Traditional and handsome. Good nickname option. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Nathaniel[/name_m]. I also like [name_m]Harrison[/name_m] for you. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Harrison[/name_m]. I’ve just noticed if you go with a name starting with a short “a” like in [name_m]Jack[/name_m], then you’ll have two siblings with the short “e” sound in the first syllable and two would have the short “a.” The symmetry is quite nice, especially if this is your last child. I also like how it alternates.
[name_m]Abel[/name_m]. It certainly has an old charm about it, although it’s surprisingly not far off [name_m]Wesley[/name_m]'s popularity currently ranking in at 146. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Abel[/name_m]. I’d also suggest [name_m]Leon[/name_m]. Familiar yet not overused. It’s quite dashing. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Leon[/name_m]. [name_m]Marshall[/name_m] would be a nice friendly choice too. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Marshall[/name_m]. Perhaps [name_m]Hugo[/name_m] as well, plus it has an international feel. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Hugo[/name_m].
Other names that would suit are [name_m]Simon[/name_m] and [name_m]Peter[/name_m]. They lean more classic. [name_m]Benjamin[/name_m] is also worth a mention. It’s higher on the charts than your boys’ names, currently placed 6 with [name_m]Wesley[/name_m] at 105 and [name_m]Jack[/name_m] at 28. But it fits the style and upbeat tone of this sibling set. [name_m]Wesley[/name_m], [name_m]Jack[/name_m], [name_u]Eloise[/name_u] and [name_m]Benjamin[/name_m].
[name_f]Hope[/name_f] something starts to stand out for you. All the best with your search.