I. Rothschild BrE AmE
a family of Jewish bankers in Europe who had a lot of influence over two hundred years.
II. Roths ‧ child, N M /ˈrɒθs-tʃaɪld $ ˈrɔːθs-/ BrE AmE
an important ↑ merchant bank (=bank that deals only with businesses, not with ordinary customers) , based in London