You're correct, it is difficult finding many who are researching this name. Actually I am researching the same name but spelt a little differently. The spelling has gone from Danczak to Dansak, ( I believe). It is also Hungarian. The Dansak's I am researching came from the New York and New Jersey area. At some point they might have gone to Texas, but I do know they moved to California from New Jersey in the 1950's if I am not mistaken, maybe earlier.
Have a nice day,