Entity recognition for enhanced document productivity

Disclosed herein are systems, methods, and software for enhancing document productivity. In one implementation, various entries in a document are examined to identify at least an entry recognizable as an entity that is potentially related to at least one of various additional entities external to the document. At least a subset of the additional entities may be identified for surfacing in a user interface for potential inclusion in the document. In response to a selection of at least one of the subset of the additional entities, at least the one additional entity of the subset of the additional entities is included in the document in association with the entry.