Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Poplĭcŭla (Poplĭcŏla) or Publĭ-cŏla (the very ancient inscr. in Orell. 547 has POPLICVLA, the palimpsest of Cic. Rep. 2, 31, 53; 55, twice Publicola), ae, m. [1. populus-colo] (a favorer or friend of the people), a surname of P. Valerius, and of his descendants, Inscr. Orell. 547: inde cognomen factum Publicolae est, Liv. 2, 8: Poplicola, ingentis Volesi Spartana propago, Sil. 2, 8; Inscr. Grut. 480, 5: Poplicola atque Corvinus, Hor. S. 1, 10, 28.
Poet., in plur., as an appellative, Sid. Carm. 23, 80.