Also means
theirs
Usage Note
Suyas is the feminine plural stressed possessive, used predicatively or after a noun — estas llaves son suyas (these keys are hers/his/theirs). Because suyo/suya/suyos/suyas is ambiguous in person (his, hers, yours-formal, theirs), context or a clarifying phrase such as de ella / de ellos is often added to avoid confusion.
Examples
"Estas ideas no son suyas, son mías."
Natural Translation
These ideas are not hers, they are mine.

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