The name Niels or Niel Brun/n is fairly common, as are Nils Brun/n and Neil Brun/n. I found a lot of names that might fit, but none are exact matches to the information you have provided.

In 1896, there is an N Brunn arriving in Sydney, Australia, as an unassisted immigrant passenger, from a port called Santos. He was aboard the ship Hertha, which originated in Skelskor, Denmark. He was age 30 in 1896.

I found a Neil Christian Brunn in the Australian registered voter rolls, in Batman, Clifton Hill, Australia in 1931, living on 6th Street, registered as a seaman.

In 1914, what may be the same person is in Melbourne Ports, Victoria, and the listing states: ketch 'Gertrude' (this is the ship), Little Dock, seaman. Next listing in the book is for a Sven Brunn, also a seaman, living on King Street.

In 1919 there is a listing for what appears to be the same person, in Melbourne Ports, Victoria, at 3 Kilby Terrace, but here he is listed as a sailmaker, no ship name listed. He is at this same address in 1924.

Nothing for a Niels Christian Brunn or similar in Texas, in the USA, that seems to fit.

Still looking for Litana or Sitana in the ship lists I have access to.