diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -4,4 +4,7 @@
 
   <https://download.bitcoinabc.org/0.27.7/>
 
-This is a maintenance release with no user-visible change.
+This release includes the following features and fixes:
+ - The `fees.ancestor` and `fees.descendant` fields from the `getrawmempool`,
+   `getmempoolentry`, `getmempoolancestors` and `getmempooldescendants` were
+   deprecated since v0.27.0 and have been completely removed.
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -498,22 +498,6 @@
                               "transaction fee with fee deltas used for "
                               "mining priority in " +
                                   ticker},
-                    RPCResult{
-                        RPCResult::Type::STR_AMOUNT, "ancestor",
-                        "DEPRECATED: modified fees (see above) of in-mempool "
-                        "ancestors (including this one) in " +
-                            ticker +
-                            ". Only displayed if the "
-                            "-deprecatedrpc=mempool_ancestors_descendants "
-                            "option is set"},
-                    RPCResult{
-                        RPCResult::Type::STR_AMOUNT, "descendant",
-                        "DEPRECATED: modified fees (see above) of in-mempool "
-                        "descendants (including this one) in " +
-                            ticker +
-                            ". Only displayed if the "
-                            "-deprecatedrpc=mempool_ancestors_descendants "
-                            "option is set"},
                 }},
             RPCResult{
                 RPCResult::Type::ARR,
@@ -581,10 +565,6 @@
     UniValue fees(UniValue::VOBJ);
     fees.pushKV("base", e.GetFee());
     fees.pushKV("modified", e.GetModifiedFee());
-    if (deprecated_ancestors_descendants) {
-        fees.pushKV("ancestor", e.GetModFeesWithAncestors());
-        fees.pushKV("descendant", e.GetModFeesWithDescendants());
-    }
     info.pushKV("fees", fees);
 
     info.pushKV("size", (int)e.GetTxSize());
diff --git a/src/txmempool.h b/src/txmempool.h
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -130,15 +130,12 @@
     uint64_t nCountWithDescendants{1};
     //! ... and size
     uint64_t nSizeWithDescendants;
-    //! ... and total fees (all including us)
-    Amount nModFeesWithDescendants;
     //! ... and sichecks
     int64_t nSigChecksWithDescendants;
 
     // Analogous statistics for ancestor transactions
     uint64_t nCountWithAncestors{1};
     uint64_t nSizeWithAncestors;
-    Amount nModFeesWithAncestors;
     int64_t nSigChecksWithAncestors;
 
 public:
@@ -167,8 +164,7 @@
     size_t DynamicMemoryUsage() const { return nUsageSize; }
     const LockPoints &GetLockPoints() const { return lockPoints; }
 
-    // Updates the fee delta used for mining priority score, and the
-    // modified fees with descendants.
+    // Updates the fee delta used for mining priority score
     void UpdateFeeDelta(Amount feeDelta);
     // Update the LockPoints after a reorg
     void UpdateLockPoints(const LockPoints &lp);
@@ -176,7 +172,6 @@
     uint64_t GetCountWithDescendants() const { return nCountWithDescendants; }
     uint64_t GetSizeWithDescendants() const { return nSizeWithDescendants; }
     uint64_t GetVirtualSizeWithDescendants() const;
-    Amount GetModFeesWithDescendants() const { return nModFeesWithDescendants; }
     int64_t GetSigChecksWithDescendants() const {
         return nSigChecksWithDescendants;
     }
@@ -186,7 +181,6 @@
     uint64_t GetCountWithAncestors() const { return nCountWithAncestors; }
     uint64_t GetSizeWithAncestors() const { return nSizeWithAncestors; }
     uint64_t GetVirtualSizeWithAncestors() const;
-    Amount GetModFeesWithAncestors() const { return nModFeesWithAncestors; }
     int64_t GetSigChecksWithAncestors() const {
         return nSigChecksWithAncestors;
     }
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -55,8 +55,7 @@
       nTxSize(tx->GetTotalSize()), nUsageSize{RecursiveDynamicUsage(tx)},
       nTime(time), entryHeight{entry_height}, spendsCoinbase(spends_coinbase),
       sigChecks(_sigChecks), lockPoints(lp), nSizeWithDescendants{GetTxSize()},
-      nModFeesWithDescendants{nFee}, nSigChecksWithDescendants{sigChecks},
-      nSizeWithAncestors{GetTxSize()}, nModFeesWithAncestors{nFee},
+      nSigChecksWithDescendants{sigChecks}, nSizeWithAncestors{GetTxSize()},
       nSigChecksWithAncestors{sigChecks} {}
 
 size_t CTxMemPoolEntry::GetTxVirtualSize() const {
@@ -80,9 +79,6 @@
 }
 
 void CTxMemPoolEntry::UpdateFeeDelta(Amount newFeeDelta) {
-    // Remove after wellington; this stat is unused after wellington
-    nModFeesWithDescendants += newFeeDelta - feeDelta;
-    nModFeesWithAncestors += newFeeDelta - feeDelta;
     feeDelta = newFeeDelta;
 }