Meaning of casal | Babel Free

Definitions

1. a surname
   by-personal-gender, feminine, masculine
2. a manor house
   masculine
3. the seat of an association, generally open to the public, of a cultural, political, recreational, etc. nature
   masculine
4. a noble house, such as the royal house of Austria or Aragon
   masculine

Examples

“Per tant, sembla clar que la llengua aragonesa (o la castellana) no era pas desconeguda entre els reis del casal d'Aragó”

So it seems clear that the Aragonese language (or the Castilian) was not unknown to the kings of the House of Aragon

CEFR level