@Oleh: Thanks for merging the PR. Hopefully you'll update GNU Elpa soon.
@Thien-Thi Thanks for fixing this quick.

I confirm ucs-names to be happy once again in both aa2u and counsel.

Closing this bug.

PS: @Thien-Thi: Strangely, I just noticed your reply here[1], but I never
got that email in my inbox.

[1]: http://lists.gnu.org/archive/html/bug-gnu-emacs/2017-10/msg00129.html
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Kaushal Modi