Letter 'i' from #436 (#483)

* Letter 'i' from #436

Continuing to separate ~#428~ #436 in to separate PRs for each letter. Also removed/corrected some entries that were not relevant/precise and augmented others. This PR has been sorted as well.

* Follow-up fixes

* Revised per feedback

* fixed broken entry

* More dupe fixes

* removed dupe

* remove another dupe