diff --git a/codes/quantum/qubits/stabilizer/fermion_into_qubit/bksf.yml b/codes/quantum/qubits/stabilizer/fermion_into_qubit/bksf.yml
index 3873c91c6..518a7b909 100644
--- a/codes/quantum/qubits/stabilizer/fermion_into_qubit/bksf.yml
+++ b/codes/quantum/qubits/stabilizer/fermion_into_qubit/bksf.yml
@@ -30,6 +30,9 @@ relations:
       detail: 'The BKSF code can be thought of as a particular MLSC \cite{arxiv:1812.08190}.'
     - code_id: 2d_bosonization
       detail: 'The BKSF code is equivalent to a distance-two 2D bosonization code for a specific edge ordering \cite{arxiv:2201.05153}.'
+# cousins:
+#   - code_id: triangular_color
+#     detail: 'The square-lattice BKSF encoding \cite{arxiv:1810.05274} has the excitation structure as one of the toric codes underlying the 2D color code \cite{manual:{Compact fermion to qubit mappings for quantum simulation}}.'
 
 
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diff --git a/codes/quantum/qubits/stabilizer/fermion_into_qubit/bvc.yml b/codes/quantum/qubits/stabilizer/fermion_into_qubit/bvc.yml
index e987200f2..71b5b8c39 100644
--- a/codes/quantum/qubits/stabilizer/fermion_into_qubit/bvc.yml
+++ b/codes/quantum/qubits/stabilizer/fermion_into_qubit/bvc.yml
@@ -28,6 +28,9 @@ relations:
     - code_id: qetc
       detail: 'The BVC code transmutes all single-qubit errors \cite{arxiv:2310.10278}.'
     - code_id: fermions_into_qubits
+  cousins:
+    - code_id: rotated_surface
+      detail: 'An appropriately chosen stabilizer generator set for the BVC code contains the stabilizers of the rotated surface code \cite{manual:{Derby, Charles. Compact fermion to qubit mappings for quantum simulation. Diss. UCL (University College London), 2023.}}.'
 
 
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diff --git a/codes/quantum/qubits/stabilizer/fermion_into_qubit/derby_klassen.yml b/codes/quantum/qubits/stabilizer/fermion_into_qubit/derby_klassen.yml
index 86bd56a71..e0636209f 100644
--- a/codes/quantum/qubits/stabilizer/fermion_into_qubit/derby_klassen.yml
+++ b/codes/quantum/qubits/stabilizer/fermion_into_qubit/derby_klassen.yml
@@ -26,6 +26,8 @@ relations:
   cousins:
     - code_id: xzzx
       detail: 'The DK code encodes fermions into excitations of the Wen plaquette model \cite{arxiv:2009.11860}.'
+    - code_id: triangular_color
+      detail: 'The DK code on several tilings resembles the 2D color code with some vertex qubits removed \cite{manual:{Derby, Charles. Compact fermion to qubit mappings for quantum simulation. Diss. UCL (University College London), 2023.}}.'
 
 
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