Mine would be… Lukinishna/Lukinishnov? Since my father has a variation of Luke/Luca/Lukas or Petrovna/Petrov since his name is [name_m]Pietro[/name_m] [name_u]Luca[/name_u] baptised, but his actual name would be [name_u]Luca[/name_u] so… Lukinishna/Lukinishnov
I cheated and looked mine up, but using the Russian variation of [name_u]Timothy[/name_u] (Timofey), mine would be Timofeyevna. Patronymics are so interesting!