Generate the utf-8 symbols with Python3, so you can '$ grep FACE utf8.list'

list_utf-8_symbols_with_names.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import unicodedata
u=""
name=""
line=""
for i in range(65000):
    u+=chr(i)

with open("utf8.list", 'w') as ul: 
    for i,c in enumerate(u):
        try:
            name=unicodedata.name(c)
            line=str(i) + " - " + c + " - " + name + "\n"
        except:
            print("Missed :", i)
        ul.write(line)