It is classic but trendy at the moment and a more fanciful sibling name would fit well.
Upper / Upper middle class names to go with Aurelia (usually pronounced Aw-ree-lee-a)
Rosamund
Pandora
Cressida
Alice
Phillipa
Alexandra
Cecelia
Antigone
Henrietta
Viola
Eleanor
Hermione
Isabella
Guinevere
Iseult / Isolda
Frances
Cecily
Some timeless boys names that seem to fit: Edwin, Charles, Edmund, Anthony, Laurence, Ralph (rayf), Alec, Francis, Alexander, Frederick
More fanciful:
Willoughby
Peregrine
Torquil
Augustus
Ptolemy
more middle Class Aurelia (Aw-ray-lee-a or A-rel-ee-ya):
Aurora
Olivia
Rosalie
Arabella (seems to have trended down like Hugo).
Also fanciful celtic names: Elowen, Kerensa etc
Natalia/Natalie
Amelia
Isabel / Annabel
Winifred
Sophia
Rowena
Elizabeth
Rosalind
Lillian
Anastasia
Valentina
Seraphina
Genevive
Astrid
Elizabeth
Esmerelda
Margot
Liana
Hugo
Cosmo
Jago
Oscar
Oliver
Raphael
Gabriel
Wilfred
Lucian
Dominic
Orlando
Alexander
Frederick
Boys names seem to be more universal.