Brigid

But after the spear had been given to him, Ruadan turned and wounded Goibniu. He pulled out the spear and hurled it at Ruadan so that it went through him; and he died in his father's presence in the Fomorian assembly. Brig came and keened for her son. At first she shrieked, in the end she wept. Then for the first time weeping and shrieking were heard in Ireland. (Now she is the Brig who invented a whistle for signalling at night.)