Holiday Classics for String Quartet is the prequel to the more advanced, "Christmas Traditions" volumes 1 and 2 by the same arranger (Latham Music). This collection of 9 holiday favorites is a level 2-2.5, or medium easy. It is accessible for students (can be played in first position with extensions), but has a more advanced harmonic structure with counter melodies/rhythms to challenge students, while at the same time keeping it interesting for the more advanced players. This collection also makes a good addition to the holiday gig collection. For 2 violins, viola, and cello. Titles include: Deck the Halls, Hark! The Herald Angels Sing, Adeste Fideles (O Come All Ye Faithful), Silent Night, Up on the House Top, Dona Nobis Pacem (Grant Us Peace), We Three Kings, Jingle Bells, and We Wish You a Merry Christmas. Set of parts. 38 pages. CNR Publishing.

This is a fun arrangement that starts in a traditional hymn style and then goes into an upbeat tempo with a bluegrass violin solo and features solo parts for the viola and cello.
Here is a link to a performance by a string quartet during a boathouse Vespers service last June, 2019
https://youtu.be/CqcsrsgTPsE

10 Easy Christmas Tunes arranged for Clarinet quartet by Francesco Leone - Set of parts: 4 Bb soprano clarinet or 3 + bass (included 2 alternative parts for Eb Alto Clarinet/Sax) . dur.13.00
contents: 1.Go Tell it on the Mountain 2.God Rest Ye Merry,Gentlemen 3.In dulci Jubilo 4.O Christmas Tree 5.O Holy Night 6.O Little Town of Bethlehem 7.Over the river and through the woods 8.The Twelve Days of Christmas 9.Up on the Housetop 10.We Thee Kings of Orient Are.

10 Easy Christmas Tunes arranged for Violin quartet. - SCORE
contents:
1.Go Tell it on the Mountain
2.God Rest Ye Merry,Gentlemen
3.In dulci Jubilo
4.O Christmas Tree
5.O Holy Night
6.O Little Town of Bethlehem
7.Over the river and through the woods
8.The Twelve Days of Christmas
9.Up on the Housetop
10.We Thee Kings of Orient Are.