If; if it happen (that); supposing that.(conjunction)
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Use "if so be" in a sentence
"And would he not straightway go to the City, to whatever struggling multitude his prison-rock held, if so be that he might prove his dream and among them see"
""No cotton have we For our ears if so be He blow that interminous snout!""
"Toss away there on the green-sward -- never mind the hyacinths, the snowdrops, the violets, if so be any are there; the perfume of their healthful lips is worth all the flowers of the world."