What does the word, 'pair ', mean?
The pair rely on longstanding contacts developed through Milburn's family, which has owned a wholesale seafood business since the 1880's.
What does the word, 'pair', mean?

Question

What does the word, 'pair ', mean?
The pair rely on longstanding contacts developed through Milburn's family, which has owned a wholesale seafood business since the 1880's.
      What does the word, 'pair', mean?

Answer

Two things that go together. In Chinese it is 双. A pair of shoes, a pair of chopsticks.
My guess is that they are referring to two brothers, or two partners. By saying they are a pair, they are suggesting that they appear very similar, or work very similarly together.