Clown goblins can be created by combining clown shoes and a clown mask. Clown goblins can be renamed by using a pen on the goblin.

code/modules/clothing/masks/gasmask.dm

@@ -130,6 +130,13 @@
 	species_fit = list("Vox")
 	can_flip = 0
 
+/obj/item/clothing/mask/gas/clown_hat/attackby(obj/item/weapon/W, mob/user)
+	..()
+	if(istype(W, /obj/item/clothing/shoes/clown_shoes))
+		new /mob/living/simple_animal/hostile/retaliate/cluwne/goblin(get_turf(src))
+		qdel(W)
+		qdel(src)
+
 /obj/item/clothing/mask/gas/clown_hat/wiz
 	name = "purple clown wig and mask"
 	desc = "Some pranksters are truly magical."

code/modules/clothing/shoes/miscellaneous.dm

@@ -121,6 +121,13 @@
 	var/step_sound = "clownstep"
 	var/footstep = 1	//used for squeeks whilst walking
 
+/obj/item/clothing/shoes/clown_shoes/attackby(obj/item/weapon/W, mob/user)
+	..()
+	if(istype(W, /obj/item/clothing/mask/gas/clown_hat))
+		new /mob/living/simple_animal/hostile/retaliate/cluwne/goblin(get_turf(src))
+		qdel(W)
+		qdel(src)
+
 /obj/item/clothing/shoes/clown_shoes/step_action()
 	if(ishuman(loc))
 		var/mob/living/carbon/human/H = loc

code/modules/mob/living/simple_animal/hostile/retaliate/cluwne.dm

@@ -330,6 +330,14 @@
 
 	melee_damage_type = "BRAIN"
 
+/mob/living/simple_animal/hostile/retaliate/cluwne/goblin/attackby(obj/item/weapon/W, mob/user)
+	if(istype(W,/obj/item/weapon/pen)) //Renaming
+		var/n_name = copytext(sanitize(input(user, "What would you like to name this clown goblin?", "Clown Goblin Name", null) as text|null), 1, MAX_NAME_LEN*3)
+		if(n_name && Adjacent(user) && !user.stat)
+			name = "[n_name]"
+		return
+	..()
+
 /mob/living/simple_animal/hostile/retaliate/cluwne/goblin/Die()
 	..()
 	new /obj/item/clothing/mask/gas/clown_hat(src.loc)