"Contributories" is a word in ENGLISH

Accompanying as a subordinate; aiding in a secondary way; additional; connected as an incident or subordinate to a principal; contributing …

One who, or that which, concurs; a joint or contributory cause.

Contributory.

Contributing to the same stock or purpose; promoting the same end; bringing assistance to some joint design, or increase to …

One who contributes, or is liable to be called upon to contribute, as toward the discharge of a common indebtedness.

In old English law. Tax-able, tributary, or contributory; liable to pay tax or tribute. Cowell; Blount