How to locate an object by name only?

I have 6 PictureBox, so when saving the photo in the database, saved together in which PictureBox it was.

Then, when loading the photos in a preview, I need each photo to be presented in its respective PictureBox, I perform the query in the database assigning the values to the List called VetorImagem.

Return a array from byte and the name of the PictureBox where the photo was.

So to mount the photo and display in PictureBox, I use the code below: '

//Crio o List chamado VetorImagem.
List<Classes.Dictionary.Crm.List_Photo_Crm> vetorImagem = new List<Classes.Dictionary.Crm.List_Photo_Crm>();
//Instancio minha classe de consulto ao banco de dados.
Classes.Dictionary.Crm.Analise_Crm Dic_foto = new Classes.Dictionary.Crm.Analise_Crm();
//realizo a consulta e associo ao List VetorImagem
vetorImagem = Dic_foto.preenche_fotos(textEdit8.Text);`

for(int a = 0; a < vetorImagem.Count; a++)
{

            //defini um nome de arquivo
            string strNomeArquivo = Convert.ToString(DateTime.Now.ToFileTime());

            using (MemoryStream stream = new MemoryStream())
            {
                stream.Write(vetorImagem[a].photo, 0, vetorImagem[a].photo.Length);

                stream.Flush(); 

                vetorImagem[a].PictureBox_Name.Image = Image.FromStream(stream);
                vetorImagem[a].PictureBox_Name.SizeMode = PictureBoxSizeMode.StretchImage;

                stream.Close();
            }
}

However, how do I locate PictureBox? For, when using vetorImagem[a].PictureBox_Name I only have the name of the object.