The best replacement for proper names is common names.

The best alternatives to proper names are rated as following:
★★★★★  common names

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Speaking about proper names, one probably shouldn't forget about apostrophe.

Other search terms related to proper names and their ratings are:
★★★★★ apostrophe
You have in mind a companion for proper names and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of proper names in all years. Click on graph for more.
proper names
common names