Berthold III. von Andechs-Meran father was Berthold II. von Istra, son of Berthold I. von Andechs, who married Sophia von Istra, daughter of Popo III. von Weimar and Krain, son of Ulrich von Weimar Krain and Istra.

Berthold III. von Andechs Meran had daughter Agnes von Meran, married to Phillip II. August, Koenig von Frankreich. Their daughter:

Maria von Frankreich married Heinrich I. von Brabant.
***

Berthold's III. other daughter Gertrud was married to Andreas II. von Ungarn.

Andreas II. von Ungarn was followed by:

Bela IV. von Ungarn
Stephan V. von Ungarn

Maria von Ungarn, Stephan's daughter, married Karl II. von Anjou.
***
Berthold's III. von Andechs Meran daughter:

Adelheid von Andechs Meran was married to Albrecht II. von Tirol, son of Albrecht I. von Tirol.
Albrecht II. von Tirol was followed by:

Albrecht III. von Tirol
Berthold I. von Tirol

Heinrich I. von Tirol married to Agnes von Wangen, followed by:

Albrecht I. von Tirol, whose daughter was:

Adelheid von Tirol married to Meinhard III. von Goerz. His son:

Albrecht I. von Goerz was followed by:

Albrecht III. von Goerz Lienz, followed by:

Meinhard VI./VII. von Goerz
***

Agnes, daughter of Berthold III. von Andechs Meran, married Phillip II. August von Frankreich. His daughter:

Maria von Frankreich married Heinrich I. von Brabant, followed by his daughter:

Margareth von Brabant married to Gerhard IV. von Geldern. His daughter:

Richarda von Geldern married Wilhelm IV. von Juelisch followed by their daughter:

Blancheflor von Juelisch married to Heinrich I. von Sponheim, followed by:

Johann II. von Sponheim
Heinrich II. von Sponheim

Johann III. von Sponheim was married to Mathilda von Pfalz, daughter of Rudolph I. von Pfalz and Mathilda von Nassau.

Johann III. von Sponheim's daughter:

Mathilda von Sponheim was married tp Rudolph VI. von Baden, followed by:

Bernhard I. von Baden

Beatrix von Baden, was married to Emich VII. von Leiningen, son of Emich VI. von Leiningen..

Emich VII. von Leiningen was followed by:

Emich VIII. von Leiningen
Emich IX. von Leiningen
Emich X. von Leiningen
Emich XI. von Leiningen
Johann Ludwig von Leiningen
Emich XIII. von Leiningen
Georg Wilhelm von Leiningen Dachsburg

Johann Karl August von Leiningen Dachsburg married to Johanna Magdalena von Hanau Lichtenberg, daughter of Johann Reinhard II. von Hanau Lichtenberg and Anna Magdalena von Pfalz Zweibruecken, daughter of Christian I. von Pfalz Zweibruecken.

Johann Karl August von Leiningen Dachsburg was followed by:

Christian Karl von Leiningen Dachsburg Falkenburg

Maria von Leiningen Dachsburg Falkenburg married to Georg Wilhelm von Hessen Darmstadt. Their daughter:

Augusta Wilhelmina von Hessen Darmstadt was married  to Maximilian Joseph I. von Bayern followed by:

Augusta Amalia von Bayern, who was married to Eugen Beauharnais.
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We have mentioned above Johann Karl August von Leiningen Dachsburg married to Johanna Magdalena von Hanau Lichtenberg, daughter of Johann Reinhard II. von Hanau Lichtenberg, who was son of Phillip Wolfgang von Hanau Lichtenberg and Johanna von Oettingen.

Johanna von Oettingen was daughter of Ludwig Eberhard von Oettingen, son of Gotfried von Oettingen Oettingen.

Gotfried von Oettingen Oettingen was son of Ludwig XVI. von Oettingen Oettingen, who again was son of Ludwig XV. von Oettingen married to Salome von Hohenzollern Hechingen.

Ludwig XV. von Oettingen was son of Wolfgang von Oettingen, who again was son of Wilhelm I. von Oettingen.

Wilhelm I. von Oettingen, son of Friedrich III. von Oettingen, was son of Ludwig XI. von Oettingen and Imagina von Schauenberg, daughter of Heinrich V. von Schauenberg and Anna von Truchendingen. Her father was:

Ulrich von Truchendingen, son of Friedrich VI. von Truchendingen, whose father was:

Friedrich V. von Truchendingen married to Agnes von Andechs Meran, daughter of Otto I. von Andechs Meran, one son of Berthold III. von Andechs-Meran.