Just for reference:
būbō (genitive būbōnis); m, third declension
an owl, especially the Eurasian eagle owl, Bubo bubo.
...
From Medieval Latin būbō, from Ancient Greek βουβών (boubōn, “groin, swelling”). (pathology) An inflamed swelling of a lymph node, especially in the armpit or the groin, due to an infection such as bubonic plague, gonorrhea, tuberculosis or syphilis.
I find this appropriate for Uggla, somehow.