Berta or Fontenberta, Mexican War, 1846-48
I'm not a BERTA researcher, but noticed one entry in the Index to Mexican War Pension records as follows, and thought this might help someone:
BERTA, Frank; alias Fontenberta.
Widow, Aguda Fontenberta, applied for widow's benefit, 02 December 1890 in Spain for husband's service in the US Navy during Mexican War.