diff -ur v44/ezmd.py v45/ezmd.py
--- v44/ezmd.py	2020-01-24 12:06:55.000000000 +0900
+++ v45/ezmd.py	2020-02-15 11:15:17.000000000 +0900
@@ -693,12 +693,28 @@
 		macro_dic_update(buf)
 		return
 
+	def make_name(s, dv_name):
+		lst = s.strip().split('\n')
+		if not lst:
+			return dv_name
+		s = lst[0]
+		if not all( map( lambda c: ord(c) < 128, s ) ):
+			return dv_name
+		s = s.replace(' ', '_')
+		names = list( map( lambda hd_name: hd_name[2], hd_names ) )
+		i = 2
+		while s in names:
+			s += '_{}'.format(i)
+			i += 1
+		return s
+
 	if mode in heads:
 		buf = lst_strip(buf)
 		buf = cut_empty(buf)
 		s = ''.join(buf)
 		(h_i, n) = ( int(mode[1:]), len(hd_names) )
 		name = 'c_{}_{}'.format(h_i, n)
+		name = make_name( s, name )
 		outbuf.append( tag_new( mode, {}, tag_new('a', {'name': name}, s) ) )
 		hd_names.append( (h_i, n, name, s) )