Rebeca

Also Provençal: https://ieo-oc.org/spip.php?page=article&id_article=300 --- Source: Institut d'Estudis Occitans

Also the Romanian form: https://ro.wikipedia.org/wiki/Rebeca_(personaj_biblic)
(You'll find numerous bearers on social media) [noted -ed]

Also Aragonese: https://an.wikipedia.org/wiki/Chenesi --- Isaac y Rebeca
http://www.lenguasdearagon.org/pdf/recursoseducativos/unnombretatu.pdf

Also Galician: http://www.ige.eu/igebdt/esq.jsp?idioma=gl&ruta=onomast/nomes.jsp
https://gl.wikipedia.org/wiki/Rebeca_(nome)

Also Catalan: http://www.idescat.cat/noms/?q=Rebeca&lang=en.

This is also the Welsh form of Rebecca.