previous edit struck out 132 but forgot to leave the actual number of bytes :-)
Python 2, (削除) 141 (削除ここまで) (削除) 137 (削除ここまで) (削除) 132 (削除ここまで) 130 bytes
-2 bytes thanks to @JonathanFrech
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if~c:print f,l,'definitely '*c+'has two first names'
Python 2, (削除) 141 (削除ここまで) (削除) 137 (削除ここまで) (削除) 132 (削除ここまで) bytes
-2 bytes thanks to @JonathanFrech
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if~c:print f,l,'definitely '*c+'has two first names'
Python 2, (削除) 141 (削除ここまで) (削除) 137 (削除ここまで) (削除) 132 (削除ここまで) 130 bytes
-2 bytes thanks to @JonathanFrech
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if~c:print f,l,'definitely '*c+'has two first names'
Python 2, (削除) 141 (削除ここまで) (削除) 137 (削除ここまで) 132(削除) 132 (削除ここまで) bytes
-2 bytes thanks to @JonathanFrech
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if-c<1if~c:print f,l,'definitely '*c+'has two first names'
Python 2, (削除) 141 (削除ここまで) (削除) 137 (削除ここまで) 132 bytes
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if-c<1:print f,l,'definitely '*c+'has two first names'
Python 2, (削除) 141 (削除ここまで) (削除) 137 (削除ここまで) (削除) 132 (削除ここまで) bytes
-2 bytes thanks to @JonathanFrech
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if~c:print f,l,'definitely '*c+'has two first names'
Python 2, (削除) 141 (削除ここまで) 137(削除) 137 (削除ここまで) 132 bytes
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if-c<1:print f+' '+l+' definitely'*c+'f,l,'definitely has'*c+'has two first names'
Python 2, (削除) 141 (削除ここまで) 137 bytes
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if-c<1:print f+' '+l+' definitely'*c+' has two first names'
Python 2, (削除) 141 (削除ここまで) (削除) 137 (削除ここまで) 132 bytes
n=map(str.split,input())
for f,l in n:
c=cmp(*[x.count(l)for x in zip(*n)])
if-c<1:print f,l,'definitely '*c+'has two first names'