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Sort of. Sails are named for their location, size, and purpose.

A staysail is a type of sail. Staysails are attached to mast stays rather than masts, or yardarms.

A jib is a type of staysail. Jibs are attached to the forward most stay(s). Other staysails are flown from stays between masts.

Other than running directly away from the wind, sailing vessels are pulled rather than pushed through the water by their sails the same way an aircraft wing provides lift. A jib acts to funnel more air over the curved mainsail behind it to increase this "pull" while providing additional "pull" of its own.

A Genoa is a type of large jib used in light wind conditions.

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