The first person active present is lacrimo, I weep.
The third person (first conjugation) is lacrimat (he/she/it weeps).
So it seems to me that Qui lacrimat would be "(she) who weeps."
But I am an indifferent Latinist and will yield to anybody who can actually read Virgil without a crib!
Ralph McInnerney mentioned "She Who Weeps" as one of the names for the Blessed Virgin, and commented that it was most appropriate considering the decision by Notre Dame to invite That One to be the commencement speaker this year. I was just wondering if there were a Latin or French translation for it. Maybe La Salette is what he was thinking.