Spanish Surname with del vs. Del

Hello, I'm researching my grandmother's (maternal) line in the mid 1700s in SLP,and I just came across a clue of an additional name: Sacramento. It is listed on a child's wedding record as Maria Prudencia Gertrudis del Sacramento Rangel. Del is not capitalized, Does this mean Sacramento is part of the surname, or an additional first name? It is the only record I found so far (after years) with that additional name listed.

Thank you,

Cynthia Jimenez

https://www.ancestrylibrary.com/imageviewer/collections/60035/images/004802624_00182?treeid=&personid=&rc=&usePUB=true&_phsrc=Lom8844&_phstart=successSource&pId=124313721&_gl=1*8rw0nx*_ga*NjU2MDYwNDkwLjE2MDEyMjY0NDk.*_ga_4QT8FMEX30*MTY1OTkwMTI3NC4yMzguMS4xNjU5OTAxNDU2LjA.