diff --git a/models/issues/content_history.go b/models/issues/content_history.go
index 721ce11f85..57a6ea728f 100644
--- a/models/issues/content_history.go
+++ b/models/issues/content_history.go
@@ -137,6 +137,7 @@ func QueryIssueContentHistoryEditedCountMap(dbCtx context.Context, issueID int64
 type IssueContentListItem struct {
 	UserID         int64
 	UserName       string
+	UserFullName   string
 	UserAvatarLink string
 
 	HistoryID      int64
@@ -148,7 +149,7 @@ type IssueContentListItem struct {
 // FetchIssueContentHistoryList fetch list
 func FetchIssueContentHistoryList(dbCtx context.Context, issueID, commentID int64) ([]*IssueContentListItem, error) {
 	res := make([]*IssueContentListItem, 0)
-	err := db.GetEngine(dbCtx).Select("u.id as user_id, u.name as user_name,"+
+	err := db.GetEngine(dbCtx).Select("u.id as user_id, u.name as user_name, u.full_name as user_full_name,"+
 		"h.id as history_id, h.edited_unix, h.is_first_created, h.is_deleted").
 		Table([]string{"issue_content_history", "h"}).
 		Join("LEFT", []string{"user", "u"}, "h.poster_id = u.id").
diff --git a/models/issues/content_history_test.go b/models/issues/content_history_test.go
index cc9a7c5107..71ccc6e6a7 100644
--- a/models/issues/content_history_test.go
+++ b/models/issues/content_history_test.go
@@ -43,8 +43,9 @@ func TestContentHistory(t *testing.T) {
 		when the refactor of models are done, this test will be possible to be run then with a real `User` model.
 	*/
 	type User struct {
-		ID   int64
-		Name string
+		ID       int64
+		Name     string
+		FullName string
 	}
 	_ = dbEngine.Sync2(&User{})
 
diff --git a/routers/web/repo/issue_content_history.go b/routers/web/repo/issue_content_history.go
index 08eb98acb8..90217a0346 100644
--- a/routers/web/repo/issue_content_history.go
+++ b/routers/web/repo/issue_content_history.go
@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"html"
 	"net/http"
+	"strings"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/models/db"
@@ -16,6 +17,7 @@ import (
 	"code.gitea.io/gitea/models/unit"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/timeutil"
 
 	"github.com/sergi/go-diff/diffmatchpatch"
@@ -68,9 +70,15 @@ func GetContentHistoryList(ctx *context.Context) {
 			actionText = i18n.Tr(lang, "repo.issues.content_history.edited")
 		}
 		timeSinceText := timeutil.TimeSinceUnix(item.EditedUnix, lang)
+
+		username := item.UserName
+		if setting.UI.DefaultShowFullName && strings.TrimSpace(item.UserFullName) != "" {
+			username = strings.TrimSpace(item.UserFullName)
+		}
+
 		results = append(results, map[string]interface{}{
 			"name": fmt.Sprintf("<img class='ui avatar image' src='%s'><strong>%s</strong> %s %s",
-				html.EscapeString(item.UserAvatarLink), html.EscapeString(item.UserName), actionText, timeSinceText),
+				html.EscapeString(item.UserAvatarLink), html.EscapeString(username), actionText, timeSinceText),
 			"value": item.HistoryID,
 		})
 	}
diff --git a/templates/repo/commit_page.tmpl b/templates/repo/commit_page.tmpl
index c995273643..0248a0deda 100644
--- a/templates/repo/commit_page.tmpl
+++ b/templates/repo/commit_page.tmpl
@@ -93,12 +93,12 @@
 								<span class="ui text mr-3">{{.i18n.Tr "repo.commits.signed_by_untrusted_user_unmatched"}}:</span>
 							{{end}}
 							{{avatar .Verification.SigningUser 28}}
-							<a href="{{.Verification.SigningUser.HomeLink}}"><strong>{{.Verification.SigningUser.Name}}</strong></a>
+							<a href="{{.Verification.SigningUser.HomeLink}}"><strong>{{.Verification.SigningUser.GetDisplayName}}</strong></a>
 						{{else}}
 							<span title="{{.i18n.Tr "gpg.default_key"}}">{{svg "gitea-lock-cog"}}</span>
 							<span class="ui text">{{.i18n.Tr "repo.commits.signed_by"}}:</span>
 							{{avatarByEmail .Verification.SigningEmail "" 28}}
-							<strong>{{.Verification.SigningUser.Name}}</strong>
+							<strong>{{.Verification.SigningUser.GetDisplayName}}</strong>
 						{{end}}
 					{{else}}
 						{{svg "gitea-unlock" 16 "mr-3"}}