Recommendations avoid excessive rhyming and favor compatible style, origin, era, and rhythm.
From French Abélard, an extension of the Abel with an Germanic suffix -(h)ard. Possibly also regarded a variant of the German Eberhard "boar" + "hard", equivalent to English…
Borrowed from French Adélaïde, from Old High German Adalheid (from adal (“noble”) + heit (“nature, character”)), modern German Adelheid; doublet of Alice.
From Old French Adeline, a diminutive form of Adela and Adele brought to England by the Normans.
A less common spelling of Adolfo.
From Albert + -a. The province was named after Princess Louise Caroline Alberta. Learned borrowing from Latin Alberta.
From Swedish Albertina, a feminine form of Albert.
From French Abélard, an extension of the Abel with an Germanic suffix -(h)ard. Possibly also regarded a variant of the German Eberhard "boar" + "hard", equivalent to English…
A less common spelling of Adolfo.
Inherited from Medieval Latin Adalferius, of Germanic origin, from Frankish *aþal (“nobility”) + *faru (“journey”), meaning “noble leader” or “noble traveller”. See English…
Borrowed from French Adélaïde, from Old High German Adalheid (from adal (“noble”) + heit (“nature, character”)), modern German Adelheid; doublet of Alice.
From Old French Adeline, a diminutive form of Adela and Adele brought to England by the Normans.
From Albert + -a. The province was named after Princess Louise Caroline Alberta. Learned borrowing from Latin Alberta.
Sibling matches balance shared style and origin with enough sound distinction, so recommendations do not simply rhyme with Bernardas.