A simple utility for displaying object names in the Editor View. It can be used to draw custom labels, object names, or names of referenced objects.

DrawLabel.cs

#if UNITY_EDITOR
using UnityEditor;
#endif
using UnityEngine;

public enum LabelMode
{
    GameObjectName = 0,
    ReferenceName = 1,
    Custom = 2
}

public class DrawLabel : MonoBehaviour
{
    public LabelMode labelMode = LabelMode.GameObjectName;
    public string label;
    public Transform reference;

    public Color color = Color.red;
    public bool show = true;
    public Vector3 offset = Vector3.zero;

    private bool IsGameObjectMode => labelMode == LabelMode.GameObjectName;
    private bool IsCustomMode => labelMode == LabelMode.Custom;
    private bool IsReferenceMode => labelMode == LabelMode.ReferenceName;

    private GUIStyle style = new GUIStyle();

    private string GetStringContent()
    {
        switch(labelMode)
        {
            case LabelMode.GameObjectName:
                return gameObject.name;
            case LabelMode.ReferenceName:
                return reference == null ? "<Null>" : reference.name;
            case LabelMode.Custom:
                return label;
        }

        return string.Empty;
    }

    private void FollowReference()
    {
        if (IsReferenceMode && reference != null)
            transform.position = reference.transform.position;
    }

    private void Update()
    {
        FollowReference();
    }

    void OnDrawGizmos()
    {
#if UNITY_EDITOR
        if (show)
        {
            style.normal.textColor = color;
            style.alignment = TextAnchor.MiddleCenter;
            Handles.Label(transform.position + offset, GetStringContent(), style);
        }
#endif
    }

    void OnValidate()
    {
        if(IsGameObjectMode) 
            label = gameObject.name;
        else if(IsReferenceMode && reference != null)
        {
            label = reference.name;
            FollowReference();
        }
    }
}