Error NoReverseMatch on django

I am receiving the following error on my page made with django.

  

Reverse for 'subscribed' with keyword arguments' {'name': u'ImHarvol '}' not found. 1 pattern (s) tried: ['edoras / newsletter / subscribed $']

The page consists of a form, which after completing it, has to redirect you to the view subscribed .

urls.py :

from django.conf.urls import url, include
from . import views

urlpatterns = [
    url(r'^$', views.index, name='index'),
    url(r'^newsletter$', views.newsletter, name='newsletter'),
    url(r'^newsletter/suscrito$', views.suscrito, name='suscrito'),
]

views.py :

    # -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.shortcuts import render

### Create your views here.

from django.shortcuts import get_object_or_404, redirect
from .forms import SuscripcionForm
from .models import Suscripcion
from .modulos import *

def index(request):
#   return render(request, 'edoras/index.html', {})
    return redirect(newsletter)

def newsletter(request):
#   return render(request, 'edoras/newsletter.html', {})
    x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
    if x_forwarded_for:
        ip = x_forwarded_for.split(',')[0]
    else:
        ip = request.META.get('REMOTE_ADDR')

    if request.method == "POST":
        form = SuscripcionForm(request.POST)
        if form.is_valid():
            suscripcion = form.save(commit=False)
            suscripcion.ip = ip
            fsuscripciones = open("/home/imharvol/web/edoras/botsuscripciones/twitters.txt", "a")
            fsuscripciones.write('\n@'+suscripcion.nombre_twitter)
            fsuscripciones.close
            suscripcion.save()
            sendmessage(suscripcion.nombre_twitter)
            return redirect('suscrito', nombre=suscripcion.nombre_twitter)
    else:
        form = SuscripcionForm()

    return render(request, 'edoras/newsletter.html', {'form': form})

def suscrito(request, nombre):
    return render(request, 'edoras/suscrito.html', {'nombre': nombre})

I guess the error is due to this line return redirect('suscrito', nombre=suscripcion.nombre_twitter) . There I am trying to send the name that they have put in the form, to the subscribed view, to then print their name.