Found this list and thought there were some really interesting possibilities!
Are there any names here you would use?
http://www.britishbabynames.com/blog/2012/11/long-lost-rarities.html
Use? Probably not. But I’m intrigued by the following
Adestan
Aistan
Aldelin
Bosker (too close to busker to be usable, I think)
Costelin
Fredmund (so exaggeratedly clunky it almost works)
Kenting
Ravelin
Sanctan
Sperling
Theodard (interesting way to get to [name_u]Theo[/name_u])
Tysilio
Wistan
Admiranda
Aileva (possible phonetic similarity to [name_f]Olivia[/name_f]?)
Alviva
Amphelisia
Aveza
Belisent (Appellation Mountain profiled this one)
Clariandra
Elysant
Endelyn
Estrild
Gisla
Jolicia
Liveva
Mazelina
Merewen
Merild
[name_f]Odelina[/name_f]
[name_f]Orabel[/name_f]
Oriolda
Pavie
Rametta
Sabelina
Salerna
Sativola
Sely
I’m not sure I would use any but these are kind of cute:
Adestan
Aistan
Bosten – A phonetic version of [name_m]Boston[/name_m]?
Costelin – Maybe a middle name?
Hasten
Kenting
Ludric
Aileva
Endelyn
Estrild
Imedia
Mazelina
Merild
Sabelina
Ysoria
I think I might be able to use Bosten, but hubby would cringe if I even mentioned it 
Sound interesting, but I wouldn’t use any of these, I think.
I think a couple, like Merewen, are totally usable. Personally, I like Gisla, Liveva, Mazelina, Sabelina, and [name_f]Odelina[/name_f]. And while I wouldn’t use Ysoria and Tysilio, I do think they’re awesome.
Adestan - interesting “downdate” of [name_u]Addison[/name_u]
Landric - I like this a lot actually! Vibes of [name_m]Landon[/name_m]/[name_m]Lance[/name_m]/[name_m]Alaric[/name_m]/etc. cool name!
Selevan - sorta [name_u]Sullivan[/name_u] meets [name_m]Silvan[/name_m], though it sounds worryingly like sell-a-van
Sperling -too “spermy”? I don’t know, but it’s interesting
Sperun - like a smoosh of [name_u]Spencer[/name_u] and [name_m]Aaron[/name_m], “spare one”
Belisent - [name_f]Bellatrix[/name_f] meets [name_f]Millicent[/name_f]. I kinda like it!
Clariandra - very beautiful actually, maybe too fussy though
Endelyn - looks a bit like [name_f]Gwendolyn[/name_f] lost her first 2 letters. I prefer it to [name_f]Endellion[/name_f] actually.
Mazelina - [name_f]Mazarine[/name_f] and [name_f]Hazel[/name_f] and [name_f]Angelina[/name_f], I think Mazeline would be my preference, but then it looks like a [name_f]Madeline[/name_f] and [name_f]Maisie[/name_f] mash up.
Merewen - very pretty actually, I like it!
Thaney - cute nn, I’ve like [name_m]Thane[/name_m] as a boy mn. Sorta looks like a Puritan used Thankful and wanted a cute nn.
Maybe for a character, but not for a child.
I kind of like:
Adestan
Alcmund
Aldelin
Ceidio
Deorstan
Hasten
Olthin
Ravelin
Belisent
Edild
Elysant
Estrild
Merewen
Merild
Ysoria
Those are the ones I like too. Well maybe not Gisla or Liveva…
I’ve went through that list before and I would consider the majority of the names unusable. The only one I somewhat like is [name_f]Odelina[/name_f].
Quirky names, but no I wouldn’t use any of them. I didn’t mind Merewen, but I disliked all the rest.