Highly likely that the Lukacs family was from Slovakia. The cs is pronounced Ch . With the spelling reform the beginning of the 1900's the cs would have been changed to just c with a upside down smile on top of the c. Still pronounced ch and in church. The are a number of Lukacs from Hermonovce, Slovakia or Hermany, Austo-Hungary. Same place, different spelling depending on time period. Today it is listed as Hermanovce, In the late 1800's it was Hermany