A widely used humanist sans whose current Google Fonts build includes Hebrew. Use it when a site already lives in Open Sans and needs Hebrew without switching families.
Avoid: Older Open Sans files (and the separate Open Sans Hebrew project) are not the same cut; check that your file actually contains Hebrew.
Use the family name in a font stack with a same-genre fallback so unsupported browsers still land on a reasonable Hebrew face.
.hebrew-open-sans {
font-family: 'David', sans-serif;
}